ConsumerLab.com uses JavaScript to provide the best possible experience for our content, but your browser has it disabled. Learn how to enable it here.

Search term may appear only in full report available to members. Join now for full access.

Product Review

Rice Review (White, Brown, Black, Wild, and Combination)

Discover Arsenic Levels in Rice and Our Top Picks.

Rice Review 2025

CL Answer

Does coffee have brain benefits?

People commonly drink coffee to increase alertness, counteract fatigue, and boost cognition, but does it really improve memory and cognitive function? Find out, and learn about risks linked with drinking too much coffee.

Silhouette of mans head with coffee beans in place of brain

Product Review

Coconut Oil and Medium Chain Triglycerides (MCT) Oil Review — Semi-Solid and Liquid Oils & Supplements

Find the Best Coconut Oil and MCT Oil. See How These Oils Compare on Medium Chain Triglycerides (MCTs), Quality, and Value.

Coconut and MCT Oils Reviewed by ConsumerLab.com

Product Review

Low-Dose Lithium Supplements Review

Choose the Best Low-Dose Lithium Supplement. CL Tests Reveal Which Low-Dose Lithium Supplements Offer the Best Quality and Value.

Very Low Lithium Supplements Reviewed by ConsumerLab.com

CL Answer

Is it safe to consume fish oil as a long-term food supplement?

Learn more about fish oil supplement safety including long-term use, side effects, and more.

Fish Oil

CL Answer

What is the difference between the "Best By" date and the "Date of Manufacture" on a supplement label? How do I know how long my supplement will last before it "goes bad"?

To understand if your vitamins and supplements expire, learn more about the "Best By" and "Date of Manufacture" dates on labels.

Supplement Best By Date 2

CL Answer

I do moderate exercise for about an hour a few times a week. Which supplements might help me, and which should I consider avoiding?

Info on what supplements are best for work out & exercise regimens, including electrolytes, protein, creatine, and BCAAs.

Supplements for Moderate Exercise

CL Answer

Can zuPOO and its primary ingredient, cascara sagrada, cleanse the gut, improve digestion and help with weight management?

zuPOO is marketed for gut support and as a colon cleanser for weight management. Find out if research supports these claims and if ingredients in zuPOO are safe.

zuPOO supplement bottle with white background

CL Answer

Is it safe to chew softgel supplements instead of swallowing them? Does this affect absorption of the ingredients?

Find out if it is safe to chew softgel supplements, instead of swallowing them, and if this affects absorption of the ingredients.

Chewing Softgels

CL Answer

I've been using a lutein supplement with 40 mg of lutein and am concerned that this dose may be too high. Are there known harmful side-effects?

Learn more about lutein side effects, proper dosage and safety in vision supplements.

Lutein

CL Answer

Is it safe to take CoQ10 while taking blood thinners like warfarin or Plavix (clopidogrel)?

Learn more about the possible counteractive effects of CoQ10 and blood thinners, including safety.

CoQ10

CL Answer

Energy Gels: What Are They Used For and Do They Contain Their Labeled Ingredients?

Energy gels are a convenient on-the-go carbohydrate source, but some products may not contain the amount of carbohydrates stated on the label.

Young woman consuming an energy gel while hiking

Product Review

Electrolytes & Sports Drinks Review

See Which Sports Drinks, Powders, and Pills Deliver the Right Electrolytes

CL Answer

Is it possible to take too much vitamin C?

Find out the daily value of vitamin C, along with possible side effects of excessive vitamin C intake. ConsumerLab explores the topic of proper vitamin C supplement usage, and why taking too much can be harmful.

Bottles of vitamin C pills

Product Review

Licorice and DGL Supplements, Candies, and Tea Review

What's In Your Licorice? Find Out and Avoid Problems.

Licorice & DGL Review 2025

Product Review

Glutathione Supplements Review

Learn How Glutathione Products Differ, Which Failed, and Our Top Picks

Glutathione Review 2024

Product Review

Inactive Ingredients / Excipients in Supplements

Find Out Why Coloring Agents, Sweeteners, Fillers & Other Inactive Ingredients Are In Your Supplements and If They're Safe.

Clinical Update

7/19/2022

Vaccines & Long COVID

Are COVID-19 vaccines helpful with long COVID? Find out.

Clinical Update

11/23/2021

Reduced "Long" COVID-19 Risk with Vaccination

Getting vaccinated before or even after having COVID-19 has been linked with reduced risk of "long" COVID.

CL Answer

I thought the B vitamins were all water soluble and did not build up in the body, so you would not build up toxic levels. Am I wrong?

Learn more about water-soluble B vitamins including niacin, B6, B12 and folic acid, and why taking too much of these vitamins can be toxic. See the symptoms of overdose and toxicity from B vitamins. ConsumerLab.com's answer explains.

B Vitamins

CL Answer

I'm considering taking vitamin K for my bones, but I take blood thinner (anticoagulant) medication. Is there a problem taking both?

Learn more about vitamin K, including info on interactions with blood thinners such as Coumadin and Jantoven, its effects on bones & impact on clotting.

CL Answer

I take warfarin (Coumadin), an anticoagulant drug. Are there supplements I should avoid, or be taking, due to this drug?

Find out which supplements should be avoided when taking blood thinners (anticoagulants) like warfarin (Coumadin), including vitamin K, St. John's wort, and curcumin.

Warfarin Supplement Interactions -- bottle of pink warfarin tablets

CL Answer

What is the best way to take curcumin? Is it better to take it all at once or in divided doses?

Find out the best way to take curcumin and turmeric supplements to increase absorption and bioavailability, plus the best way to cook with turmeric spice. ConsumerLab.com's answer explains.

Turmeric Review 2025

CL Answer

Should I take, or avoid, any supplements if I take omeprazole (Prilosec), esomeprazole (Nexium), or other proton pump inhibitors for heartburn?

Supplement interactions with proton pump inhibitor (PPI) drugs like omeprazole (Prilosec) and Nexium.

CL Answer

I'm over 50 and looking to take a vitamin B-12 supplement. Many contain a form of vitamin B-12 called cyanocobalamin, yet I read on the Internet that this form is toxic. Should I be concerned?

Looking to see if the cyanocobalamin form of vitamin B-12 is safe? Read research and safety information on ConsumerLab's report.

Vitamin B-12

CL Answer

Which supplements are helpful to have when traveling? Any tips on how to best store supplements on trips?

Find out which vitamins & supplements can be helpful when traveling, including melatonin, ginger, and more, and find out how you can carry them with you.

CL Answer

What is the difference between forms of vitamin K2?

Learn about the different forms of vitamin K2 - MK-4 (synthetic) and MK-7 (natural, from natto).

Vitamin K: MK-4 vs MK-7 -- vitamin K tablets in the shape of the letter 'K'

Clinical Update

11/11/2021

Long COVID Symptoms Not Due to COVID?

A recent study suggests that "long COVID" symptoms reported by some people may not be due to COVID. Find out why this is of concern.

Clinical Update

Clinical Update

3/17/2020

How Long Does Coronavirus Last On Surfaces?

We've added new information about how long the coronavirus might last on packaging, and how this varies greatly depending on the package material, in our answer to the question: Can I get the new coronavirus (2019-nCoV) from supplements from China?

Clinical Update

3/18/2022

Blood Type & Long COVID

People with a particular blood type appear more likely to experience long COVID, according to a recent study. Get the details in our answer to the question: How Should You Take Care of Yourself After You've Had COVID-19?

Clinical Update

11/11/2022

Paxlovid May Reduce Risk of Long COVID

Taking Paxlovid after testing positive for COVID-19 reduced the risk of long-term symptoms. For details, see our CL Answer about COVID-19 treatments.

Clinical Update

11/17/2025

A Supplement for Long COVID?

Did nicotinamide riboside (an NAD booster) improve symptoms like “brain fog” in people with long COVID? See the study results in our NAD Boosters Review, which includes our Top Picks for NAD, NADH, nicotinamide riboside, and NMN.

Clinical Update

10/02/2024

Low-dose Lithium for Long COVID?

Did taking low-dose lithium improve symptoms of long COVID? Find out what a recent study showed in the What It Does section of our Low-Dose Lithium Review, which includes our Top Picks for low-dose lithium.

Clinical Update

1/02/2025

Fish Oil for Long COVID?

Does taking fish oil improve symptoms of long COVID such as shortness of breath, cough, fatigue, lack of taste, or loss of smell? Find out what a recent study showed in the COVID-19 section of our Fish Oil Supplements Review, which includes our Top Picks for fish oil.

CL Answer

Risks of Too Many Vitamins & Supplements

Taking too many vitamin supplements -- or taking too much of a particular supplement -- can have short and long-term adverse effects.

Too Many Vitamins

CL Answer

Do Probiotics, Such as Those by Bioma and Pendulum, Boost GLP-1 to Help with Weight Loss?

Discover the differences between probiotics and GLP-1 agonists for blood sugar and weight management. Products discussed include Pendulum Glucose Control, Pendulum GLP-1 Probiotic, and Bioma Gut Health Probiotics.

Scale and measuring tape with capsules

CL Answer

I use beta-sitosterol for my prostate. Should it be taken with or without food?

How should you take the prostate supplement beta-sitosterol to maximize absorption? Learn more at ConsumerLab.com.

How to Take Beta-Sitosterol -- man holding beta-sitosterol capsules

CL Answer

What are the side effects of magnesium supplements?

Info on magnesium supplement side effects, such as stomach upset, nausea and diarrhea. Learn about magnesium dosage, safety and drug interactions. ConsumerLab.com answer explains.

Magnesium Side Effects -- Magnesium supplements

Product Review

Melatonin Supplements Review

Trouble Sleeping? See CL's Tests of Melatonin Supplements and Top Picks.

Melatonin Review 2024

Product Review

Zinc Supplements, Lozenges, and Melts Review

Find the Best Zinc Supplements, Including Lozenges for Colds.

Zinc Review 2024

Product Review

Mangosteen Juice and Supplements Review Article

What Are the Benefits of Mangosteen Juice and Supplements? Find Out What Mangosteen Can and Cannot Do For Your Health.

Product Review

Hoodia (Hoodia gordonii) Supplements Review Article

Hoodia Supplements for Weight Loss. Will Hoodia help you lose weight? Make sure you know the facts.

Product Review

Maca Supplements Review

Choose the Best Maca Supplement. Make Sure Your Maca Supplement Isn't Contaminated With Lead.

Maca Supplements Reviewed by ConsumerLab.com

CL Answer

Is ingesting colloidal silver helpful for any condition and is it safe to use?

Find out if there is evidence showing colloidal silver can help to treat infections, boost the immune system, help with arthritis and more, plus find out if colloidal silver can cause blue skin or other side effects.

Benefits and Risks of Colloidal Silver? -- dropper bottle of colloidal silver

CL Answer

Do any supplements naturally suppress appetite and help with weight loss?

Learn which natural ingredients can suppress appetite and find if these natural appetite suppressants help with weight loss.

Container of natural appetite suppressant supplement with measuring tape and scale in background

Clinical Update

1/25/2022

Timing Vaccines Around COVID Drugs

Learn how long you need to delay vaccination after receiving drug therapy for COVID-19, including antivirals (such as remdesivir and Paxlovid) and antibody treatments.

CL Answer

Are Pyruvate Supplements Helpful and Safe?

Pyruvate supplements have been promoted for weight loss, boosting athletic performance, and lowering cholesterol. Find out if they work, if they're safe, and how to choose a pyruvate supplement.

Pyruvate powder and capsules

CL Answer

What are the health benefits of zinc carnosine, also called polaprezinc, and is it safe?

Find out if zinc carnosine is beneficial for any GI conditions, including stomach ulcers, Helicobacter pylori infection, taste disturbances, aspirin-induced small-bowel injury and oral mucositis, and learn if it is safe.

Zinc carnosine supplements in wooden spoon in front of oysters

CL Answer

What are the health benefits of serrapeptase?

Serrapeptase is a proteolytic enzyme. Learn more about its health effects, including whether evidence supports its use for pain, inflammation, and heart health.

Serrapeptase for Inflammation and Pain

CL Answer

What is the difference between CoQ10 and ubiquinol?

Understand the difference between CoQ10 (ubiquinone) and the active form, ubiquinol, and how they are best absorbed. ConsumerLab explains.

The Difference Between CoQ10 and Ubiquinol -- CoQ10 Supplement

CL Answer

Does collagen taken as a supplement help with arthritis? I'm seeing it in products for joint health.

Learn more about collagen supplements, including evidence from clinical studies on arthritis and muscle strength and safety.

Collagen Supplements for Joint Pain

CL Answer

What are the side effects of ashwagandha supplements?

Learn about the safety and side effects of ashwagandha supplements, including headache, sleepiness, upset stomach, blood pressure and more. ConsumerLab.com's answer explains.

ashwagandha side effects

Product Review

Weight Loss Supplements Review (7-Keto DHEA, Forskolin and Stimulant Blend Supplements)

Choose the Best Weight Loss Supplement. Be Careful With Weight Loss Supplements — Few Pass Quality Testing and Safety Review.

Weight Loss Supplements Tested by ConsumerLab.com

CL Answer

How much magnesium do I need and how much magnesium from supplements is too much?

Find out how much magnesium you should be getting on a daily basis, signs of magnesium deficiency, and how much magnesium is too much, particularly from magnesium supplements and laxatives containing magnesium. Find out the side effects and potential adverse effects of too much magnesium.

Magnesium Review 2024

CL Answer

Do any supplements reduce wrinkles, increase skin elasticity, or tighten the skin?

Learn about collagen, biotin, CoQ10, cocoa, soy isoflavones, phytoceramides, and other supplements for reducing wrinkles and improving aging skin.

Elderly Woman Smiling Looking in Mirror

CL Answer

Is Hershey's Special Dark better than other dark chocolate bars or cocoa powders?

Find out if Hershey's Special Dark Chocolate bar is better than other dark chocolate bars or cocoa powders, including flavanol content, contamination with lead or cadmium and other tests of quality. ConsumerLab.com's answer explains.

Chocolate Bar

CL Answer

Have you heard of the probiotic, Keybiotics? Does it do what it claims, and is it worth the money they charge?

Whole Body Research Keybiotics probiotic information, including its ingredients and possible cheaper alternatives.

Probiotics

CL Answer

What is magnesium stearate, what is it made from, and is it dangerous?

Learn more about magnesium stearate and its safety, based on evidence from clinical studies.

Is magnesium stearate safe? -- woman looking at ingredients on supplement label

CL Answer

Can fisetin, also called Cognisetin and Novusetin, really improve memory or slow aging?

Can fisetin (Cognisetin and Novusetin) improve memory or slow aging? Find out what clinical research shows and learn about safety and pricing of fisetin.

Fisetin Supplements on Wooden Plate with Strawberries

CL Answer

Does OsteoMD improve calcium absorption and increase bone density?

ConsumerLab reviews the evidence for OsteoMD by 1MD, a bone health supplement promoted to slow bone loss and reduce the risk of osteoporosis.

OsteoMD by 1MD

CL Answer

Does taking creatine affect blood or urine test results?

Find out if creatine can affect creatinine levels and kidney function and whether creatine affects creatine kinase activity, a measure of muscle injury.

scoop of creatine with creatine powder on table

CL Answer

Do "Mr. Happy Stack" supplements improve memory, cognition and mood, and are they safe?

Find out if Happy Stack supplements really work to enhance memory and cognition, plus safety and side effects. ConsumerLab.com's answer explains.

Happy Stack for Memory? -- Person holding a capsule

CL Answer

Dihydromyricetin (DHM) – Does It Help and Is it Safe?

Dihydromyricetin (DHM) is promoted for liver health, diabetes, lowering cholesterol, and as a hangover remedy. Find out if it works and whether it is safe.

woman pouring white capsules from a pill bottle into her hand

CL Answer

Is Folic Acid the Same Thing as Folate?

There are important differences between folic acid and folate, including how well these forms of vitamin B-9 are absorbed, dosage, and how much is too much. Get the details, including what to look for on supplement labels, in our article about folic acid and folate.

Folic acid vs folate

CL Answer

Do any supplements help with pancreatitis? Do any cause pancreatitis?

Find out if supplements including digestive enzymes, antioxidants, or medium-chain triglycerides are beneficial for chronic pancreatitis, and learn which supplements might worsen symptoms.

Person with pancreatitis holding their abdomen

CL Answer

Top 8 vitamins and nutrients for vegetarians and vegans

Find out which 8 supplements may be needed by vegetarians or vegans to meet all their daily nutrient requirements and learn ways to find supplements that do not contain ingredients objectionable to people following vegetarian or vegan diets.

Woman pouring supplements into her hand while sitting in front of a table on which vegetables are placed

CL Answer

Do any supplements, foods, or oils help reduce muscle pain, muscle cramps, or nighttime leg cramps?

Find out which supplements, and topical products such as magnesium creams, can help reduce muscle pain, leg cramps, and nighttime leg cramps, and which may worsen muscle cramps. Also, learn about vitamin and mineral deficiencies and common medications that can cause muscle cramps and nocturnal leg cramps.

Magnesium & Other Supplements for Muscle Pain & Cramps -- woman with leg cramp

Clinical Update

1/19/2014

Multivitamin Lowers Cataract Risk

A large, long-term study using a low-dose multivitamin found that it reduced the risk of developing cataract (a clouding of the lens of the eye) by 9% compared to placebo. Interestingly, the reduced risk of cataract was negated when a separate vitamin C supplement was also taken. For details about the study and dosage, as well as our tests and comparison of multivitamins, see the updated Multivitamin and Multimineral Supplements Review.   

Clinical Update

10/10/2014

CoQ10 Benefit Takes Time

A large study found that a daily dose of CoQ10 reduced the chances of hospitalization or death by almost 50% in people with moderate to severe heart failure -- but only after being taken for an extended period of time. Find out how much CoQ10 was taken and for how long, and get our quality ratings and comparisons of CoQ10 supplements, in the updated CoQ10 and Ubiquinol Supplements Review >>

Clinical Update

3/03/2015

Caution Urged with Melatonin

In light of increasing use of melatonin in children, an expert is cautioning that its long-term safety has not been established and it should be used carefully. For more about this -- as well as other concerns with melatonin, its efficacy, and our reviews of melatonin supplements, see the Melatonin Supplements Review >>

Clinical Update

5/02/2015

Too Much Vitamin D

A U.S. study showed a recent 26-fold increase in the percentage of people with excessive blood levels of vitamin D, driven by increased supplement use. Although acute toxic effects were rare, potential long-term risks exist with these high levels. See the details in Vitamin D Supplements Review >>

Clinical Update

10/03/2015

Melatonin Safety in Women

A year-long, placebo-controlled study in postmenopausal women found that moderate doses of melatonin resulted in no increase in daytime drowsiness or adverse events. Get more details and about this and other melatonin studies (and see tests of products) in the Melatonin Supplements Review >>

Clinical Update

4/23/2016

Curcumin and Cognition

Curcumin (from turmeric) has been shown to provide anti-inflammatory effects, helpful in osteoarthritis and gastrointestinal conditions, and even an anti-depressant effect. A recent long-term study evaluated its effects on cognition and memory in older people. See the results in the "What It Does" section of the Turmeric/Curcumin Supplements Review (which includes our tests of popular products) >>

Clinical Update

6/04/2016

Osteoarthritis and Vitamin D

A large, long-term study among older people with knee osteoarthritis found no benefit from taking vitamin D. More details about this -- and about vitamin D for many other conditions -- are found in the "What It Does" section in our Vitamin D Supplements Review >>

Clinical Update

7/06/2016

Lower Risk of Death With Green Tea

A long-term study of men in China found that those who regularly drank green tea — particularly larger amounts — were less likely to die during the study and had lower risks of dying from cardiovascular disease or cancer, compared to non-green tea drinkers. Get the details in the "What It Does" section of the Green Tea Review >>

Clinical Update

7/16/2016

Magnesium and Heart Disease

People with lower blood levels of magnesium were 36% more likely to die from heart disease than those with moderate levels according to a new, long-term study. For more details, see the "What It Does" section of the Magnesium Supplements Review >>

Clinical Update

8/30/2016

Resveratrol for Blood Sugar?

Despite preliminary studies which found resveratrol to help lower blood sugar in people with type 2 diabetes, a larger long-term study found no benefit. Find out more in the "What It Does" section of the Resveratrol Supplements Review >>

Clinical Update

3/29/2017

Vitamin E/Selenium & Alzheimer's

A long-term study among men in the U.S. found that giving high doses of vitamin E and/or selenium did not significantly affect their risk of developing dementia. The study was part of a larger study which found that these supplements increased the risk of prostate cancer, type 2 diabetes, hair loss, and dermatitis. For details, see the "Alzheimer's disease/dementia" section of the Selenium Supplements Review >>

Clinical Update

5/30/2017

Heart Risk Lower with Chocolate

Eating chocolate is associated with a reduced risk of developing atrial fibrillation, according to a large, long-term study. Atrial fibrillation is associated with higher risk of stroke, heart failure and other serious problems. Details about this and other benefits of chocolate are found in the "What It Does" section of the Chocolate and Cocoa Powders Review, which includes our findings for the flavanol content and contamination levels of popular products.

Clinical Update

11/08/2017

Dark Chocolate for Memory

Short-term studies suggest that large doses of cocoa flavanols improve certain aspects of memory and cognition. A new study suggests that long-term habitual intake of dark chocolate, which is rich in flavanols, can also help. For more information, see the "What It Does" section of the Dark Chocolate and Cocoa Review >> [Also see our Top Picks for dark chocolate bars in the Review.]

Clinical Update

9/09/2015

Vitamin C: The Exercise Replacement?

A small clinical study recently found that taking vitamin C had a positive effect on blood vessels similar to a daily walk. The study focused on overweight and obese individuals, in whom blood vessel tone is compromised. Long-term effects were not studied. Get details about the study (including dose) and other pros and cons of vitamin C in the Vitamin C Supplements Review >>

Clinical Update

6/23/2018

Probiotics for Bones

Can taking a daily probiotic help reduce bone loss? Find out what a year-long study showed in the Bone density and fractures section of the Probiotic Supplements Review. (Also see our Top Picks among probiotic supplements.)

Clinical Update

9/18/2018

Curcumin Effect on Liver

Long-term use of curcumin may negatively affect the liver in a small percentage of people, according to a new report. Get the details in the Concerns and Cautions section of the Turmeric and Curcumin Supplements Review. (Also see our Top Picks for turmeric and curcumin.)

Clinical Update

12/14/2017

Danger from Too Much Vitamin B6

A women who was consuming large amounts of an energy drink as well as a B-vitamin complex developed symptoms of vitamin B6 (pyridoxine) toxicity (which may not be reversible), according to a recent report. Get the details in the "B6" section of B Vitamin Supplements Review >>

CL has long warned that energy drinks and shots often contain large amounts of B6 and other B vitamins.

Clinical Update

11/11/2019

Platelet Concern With High-dose Niacin

Long-term use of high-dose niacin may lower platelet counts. Learn more in the Niacin section of the B Vitamin Supplements Review.

Clinical Update

7/18/2020

Vitamin D and Risk of Death

Increasing vitamin D blood levels was associated with a lower risk of death over time in a recently published long-term study, but only up to a certain level. Find out at what vitamin D blood level the benefit ended in the What It Does section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D and be aware of how much is too much vitamin D.

Clinical Update

3/20/2019

Hot Tea & Cancer

Drinking very hot tea increases the risk of developing esophageal cancer. How long should you wait after brewing to drink tea? Find out what recent studies are showing in the What It Does section of the Green Tea Review. Also see other tips for the best way to prepare brewable green tea, and our Top Picks among green tea products.

Clinical Update

8/13/2019

Folic Acid and Colon Cancer

Several studies have evaluated whether folate from food and/or folic acid from supplements affect cancer risk. Find out what a recent report suggests about long-term, high-dose folic acid supplementation in the Folate section of the B Vitamin Supplements Review. Also see our Top Picks for folic acid and other B vitamin supplements.

Clinical Update

3/16/2019

Colloidal Silver Concern

Long-term use of colloidal silver may have contributed to the development of bone marrow cancer, according to a new report. We've added details about this to our answer to the question: Is ingesting colloidal silver helpful for any condition and is it safe to use?

Clinical Update

7/02/2019

Best Way to Take CBD

If you use CBD, it's important that you take it in a way that maximizes its absorption. To learn more, see the What to Consider When Using section of the CBD Oils and Hemp Extracts Review, where you'll also see results of a new study showing that how you take CBD may dramatically affect how long it remains in your body. Also see our Top Picks among products.

Clinical Update

2/01/2022

Olive Oil Lowers Risk of Death

Regular consumption of olive oil was associated with reduced risk of death from heart disease, cancer, and Alzheimer’s disease in a large, long-term study – but only if replacing certain other foods. Get the details in the What It Does section of our Extra Virgin Olive Oil Review. Also see our Top Picks among extra virgin olive oils.

Clinical Update

8/21/2021

Mediterranean vs. Low-Fat Diet for Arteries

A long-term study in people with coronary heart disease compared the effects of a Mediterranean diet rich in olive oil with a low-fat diet. Find out which diet decreased atherosclerosis (plaque build-up in arteries) in the Cardiovascular Disease section of our Extra Virgin Olive Oil Review. Also see our Top Picks among extra virgin olive oils.

Clinical Update

9/07/2021

COVID Symptoms in Breakthrough Cases

Fully vaccinated people who get COVID are much less likely to experience symptoms, as well as long-COVID, than unvaccinated people with COVID to according to a recent study. Get the details.

Clinical Update

4/14/2020

Zinc Concern

Zinc is a popular supplement right now due to COVID-19, but be aware that taking large doses of zinc for a long period of time can suppress the immune system by causing or exacerbating copper deficiency. Certain people may be more at risk for this. Get the details in the Cautions and Concerns section of the Zinc Supplements and Lozenges Review.

Clinical Update

2/01/2020

Pomegranate for Memory?

Pomegranate juice and supplements have been promoted for improving cardiovascular health, controlling blood sugar, and inhibiting prostate cancer. Most recently pomegranate juice was tested in a year-long study for its effects on memory. Find out if it helped, and see if it works for other touted uses, in the What It Does section of the Pomegranate Juice and Supplements Review Article.

Clinical Update

10/21/2012

Vitamin D for Lupus

A recent small study found that vitamin D supplements helped people with lupus (systemic lupus erythematosus -- SLE), a long-term autoimmune disease. See the update to the Vitamin D Supplements Review which has details on who may benefit, dosage, and results of our product tests. More >>

Clinical Update

5/05/2013

Omega-6 for Eczema?

Supplements with the omega-6 fatty acid GLA from evening primrose oil or borage oil have long been promoted to treat eczema. However, a recent review of data from 27 studies casts doubt on this use. Get more information about this, and about omega-3 and -6 fatty acids, in the updated Black Currant, Borage, Evening Primrose, and Flaxeed Oil Supplements Review >>

Clinical Update

2/24/2013

Calcium Risk for Women

A long-term study found that women with high calcium intakes from their diets were 40% more likely to die during the study than women with moderate calcium intake. Worse, the risk of death was 157% higher for women with high dietary calcium intake who also took a calcium supplement. What should you do? Get the details in the recent update to the Calcium Supplements Review and read our latest recommendations on calcium intake in the What You Need to Know section.)

Clinical Update

1/08/2012

B-12 and Folic Acid for Memory

Small but significant improvements in short and long-term memory were found to occur in older people (aged 60 to 74) given modest daily amounts of vitamin B-12 and folic acid. But don't expect immediate results. Improvements were seen only after 2 years of supplementation. See the update in the B Vitamins Review for the dosage used, as well as our ratings of supplements with vitamin B-12 and folic acid.

Clinical Update

3/09/2011

Antacids and Magnesium -- Be Careful!

There is a new alert that long-term use (over a year) of proton pump inhibitors can cause low magnesium levels. Magnesium supplements can usually help. See the Magnesium Product Review for details including symptoms of magnesium deficiency and a list of affected products. More >>

Clinical Update

4/19/2024

NMN and Kidney Injury

New laboratory research suggests that long-term supplementation with NMN might cause kidney injury in older people. Learn more in the Concerns and Cautions section of our NAD Booster Supplements Review.

Clinical Update

4/26/2024

Supplements to Avoid Before Surgery?

We've added additional supplements you should stop taking before surgery to avoid increased bleeding risk to our related article, which includes recommendations on how long before surgery these should be discontinued.

Clinical Update

7/18/2023

Vitamin D and Doxycycline

Should I take vitamin D when on doxycycline (used to treat Lyme disease)? Read why you may want to supplement with vitamin D if you’re on a long course of treatment with a medication that causes photosensitivity, such as doxycycline.

Clinical Update

8/08/2023

Sweeteners & Obesity

Is long-term use of aspartame, saccharin or sucralose linked with increased body fat, weight gain, and risk of obesity? See what a recent study showed in our updated article about sugar substitutes.

Clinical Update

10/28/2022

Herb for Boosting Testosterone?

A CL Member asked if Eurycoma longifolia (also called Long Jack or Tongkat Ali) alone or in combination with Fadogia agrestis could help boost testosterone. Find out what research suggests, including safety concerns, in our article about supplements for boosting testosterone.

Clinical Update

4/25/2023

Copper Deficiency from Zinc

Taking high-dose zinc long-term can cause copper deficiency, resulting in a range of adverse effects. Because testing for copper deficiency is not routine, it may go undiagnosed, as shown in a recent study. Find out how to avoid copper deficiency when taking zinc in the Concerns and Cautions section of our Zinc Supplements and Lozenges Review.

Clinical Update

6/14/2022

Duration of EVUSHELD Protection

How long does the medicine EVUSHELD protect against COVID-19? Find out what recent data showed in our article about medicines to prevent and treat COVID-19.

Clinical Update

7/08/2022

Supplement for Post-COVID Fatigue?

Did supplementing with oxaloacetate reduce symptoms in people with post-COVID fatigue in a recent study? Find out in the Strategies for managing long COVID section of our article about How to Take Care of Yourself After You’ve Had COVID-19.

Clinical Update

8/09/2022

How Long Are You Contagious?

If you test positive on a rapid antigen test after a 5-day isolation, how likely are you to still be contagious? Find out in our CL Answer about COVID-19 testing.

Clinical Update

12/09/2024

Valerian for Sleep?

How long does it take for valerian to increase sleep? See what one study found in the Sleep section of our Valerian Supplements Review, which includes our Top Picks for valerian.

Clinical Update

12/23/2024

Turmeric & Vision

A long-term study found that people using turmeric (curcumin) supplements were far less likely to develop age-related macular degeneration than non-users. For details, see our Turmeric Supplements Review, which includes our Top Picks among turmeric and curcumin supplements.

Also see our Vision Supplements Review, which includes our Top Pick among AREDS2 vision formula supplements.

Clinical Update

1/09/2025

Low Magnesium Due to PPI Use

Be aware that long-term use of proton-pump inhibitors (PPIs, such as Prilosec, Nexium, and Prevacid) can cause magnesium deficiency. Magnesium supplementation is sometimes not enough to reverse this. Learn more in our Magnesium Supplements Review, which includes our Top Picks for magnesium.

Clinical Update

11/01/2024

Arsenic in Water Linked to Heart Disease

Long-term exposure to arsenic in drinking water was linked to increased risk of ischemic heart disease in women, according to a recent study. Get the details in our Water Filter Pitchers Review. Also see how popular water filter pitchers compare on their ability to remove arsenic from water -- some remove at least 90%, while other remove less than 15%.

Also see our Top Picks among water filter pitchers.

Clinical Update

7/22/2024

Near Infrared Light for Cognition?

Find out if near infrared (NIR) light therapy improved cognitive function in healthy people or those with dementia in our article about red and NIR light therapy.

Also, learn whether red light therapy is beneficial for actinic keratosis (scaly patches on the skin caused by long-term sun exposure).

Clinical Update

11/03/2025

Melatonin: Potential Risks of Long-Term Use

Taking melatonin for a year or more was linked to increased risk of heart failure and higher overall mortality, according to a new study. For details, see the Concerns and Cautions section of our Melatonin Supplements Review, which includes our Top Picks for melatonin.

Clinical Update

7/31/2025

How long is permethrin-treated clothing effective at repelling insects?

Find out how many times clothing sprayed or impregnated with permethrin can be washed before it loses effectiveness, and how to extend this. Get the details in our article about insect repellents.

Clinical Update

1/12/2026

Unusual Side Effect of Kratom

Long-term use of kratom has been linked with an unusual change in the skin. Get the details in our article about kratom.

Clinical Update

4/21/2026

Best Calcium When Taking a PPI

If you take an acid-blocking PPI (proton pump inhibitor) such as Prilosec or Prevacid, be aware that it can affect the absorption of calcium and other minerals. In some cases, long-term use has been linked with increased fracture risk. Find out which form of calcium may be best absorbed when taking a PPI in our Calcium Supplements Review, which includes our Top Picks for calcium.

CL Answer

8 Supplements That May Help Treat Peptic Ulcers – And Some to Avoid

Peptic ulcers caused by H. pylori infection are typically treated with antibiotics, but certain supplements may also help. Find out which 8 supplements might be beneficial - and which should be avoided.

Supplements for peptic ulcer disease - young man with stomachache

Product Review

Shilajit Supplements Review (Resins and Extracts)

We Discovered Major Differences Among Shilajit Supplements

Shilajit Review 2024

CL Answer

Is it true that NAC can help clear nasal passages?

Find out if N-Acetyl Cysteine (NAC) can help with post nasal drip & general sinus congestion and about supplements that may reduce cold symptoms.

Ill Woman in Bed Blowing Nose

CL Answer

I have been having dizziness for the past few months and am wondering if it could be a side effect of supplements I take. Which supplements cause dizziness?

Find out which supplements that may cause dizziness, vertigo, or imbalance, including garlic, melatonin, saw palmetto, and red yeast rice.

Young Woman Helping Elderly Woman Remain Upright

CL Answer

Does yacon syrup decrease appetite or help with weight loss? How do I find a quality brand?

Can yacon syrup can help with weight loss? Learn more, including clinical evidence, side effects, and dosage.

Yacon syrup for weight loss?

Clinical Update

8/25/2013

Antioxidants: Too Much of a Good Thing?

A new, long-term study of Americans found the risk of dying over the course of the study (about 14 years) was lowest when antioxidant levels in the blood were above the lowest levels (the bottom 20% of the population). However, for people in the top 20% of blood levels for vitamins A and E, the risk of death increased compared to people with moderate levels. For selenium and beta-carotene, there was no significant difference in the death rate between moderate and high levels, although for vitamin C some additional benefit was seen at high, but not the highest, levels.
 
The results suggest that antioxidant supplements may be useful for those who are nutritionally deficient, but, as noted by the researchers, "beyond a certain threshold, higher levels do not lead to additional benefit, and may potentially be toxic." More details (including specific serum levels) are found in the linked updates to the following reviews, which include our test results and quality ratings of products:
 
 
  
  

CL Answer

Is kratom too dangerous to use?

Find out if kratom is safe/legal to use, including potential adverse effects, such as agitation, rapid heartbeat, nausea, drowsiness, seizures, and possible drug interactions.

Is kratom safe? Is it legal? -- Kratom leaf and pills

CL Answer

Resistant Starch: Health Benefits & Safety

Resistant starches have been promoted for improving bowel function, blood sugar control, reducing risk factors of metabolic syndrome, and for weight loss. Find out if they work.

Green bananas

Product Review

Muscle & Workout Supplements Review (Creatine and Branched-chain Amino Acids)

Do Creatine and BCAAs Really Improve Strength and Recovery?

Product Review

Aloe Juices, Gels, and Supplements Review

How Much Aloe is Really in Aloe Products? Find Out and See Our Top Picks.

CL Answer

Are L-carnosine supplements helpful and safe?

Learn about the potential health benefits of L-carnosine, as well as possible safety concerns, drug interactions and cost.

Capsules with white powder and spoon holding white powder on white background

CL Answer

Are antioxidant supplements good or bad for you?

Learn more about whether antioxidants like astaxanthin, beta-carotene, coenzyme Q10, curcumin, resveratrol, selenium, vitamin A, vitamin C and vitamin E are safe and if they help prevent chronic diseases.

Can Antioxidants Cause You to Die Sooner? -- antioxidant supplements and carrots

CL Answer

Do sea moss and carrageenan have health benefits? Are there risks?

Sea moss is promoted for thyroid health, boosting immunity, improving gut health, and other uses. Find out if it works and learn about possible side effects of sea moss and its constituent, carrageenan.

Sea moss in a clear bowl next to a wooden spoon on the countertop

CL Answer

What are the benefits of grape seed extract?

Learn about the health benefits of grape seed extract, and find out it improves venous insufficiency, leg swelling, swelling after surgery, or can help to lower blood pressure.

Benefits of Grape Seed Extract -- grapes and seeds

CL Answer

Do any supplements or foods benefit people with Crohn's disease? Are there any supplements that should be avoided?

Find out the most common vitamin and mineral deficiencies in people with Crohn's disease, including iron, B6, B12, vitamin D, zinc and others, plus evidence for N-acetyl-glucosamine (NAG), fish oil, and curcumin.

Supplements for Crohn's Disease -- Crohn's Disease Written on Notepad, Pills

CL Answer

Do any supplements, foods or lifestyle modifications help with brain function, like memory and cognition?

Find out which supplements help improve memory, brain function and cognition, including fish oil, some B vitamins, cocoa, and curcumin. ConsumerLab's answer explains the evidence for supplements promoted to help with brain function and cognition.

Supplements for Memory -- doctor holding a model of a brain and fish oil capsule

CL Answer

Do vitamins, minerals or other supplements lose effectiveness with exposure to high temperatures?

Are vitamins and supplements susceptible to heat? Find out if mail ordering during the summer is safe.

Heat's Effect on Supplements in the Mail -- Woman receiving a package

CL Answer

What are phytoceramides? Do phytoceramide supplements really work to improve aging skin?

Phytoceramide supplement information, including what they are, what they claim to do, and if they have anti-aging effects.

Phytoceramides for Aging Skin? -- woman looking at skin up close in mirror

CL Answer

10 Supplements That May Boost Testosterone (And 13 That May Not)

Many supplements promise to increase testestorone, boost libido, and increase muscle size, but, as ConsumerLab explains, the actual effectiveness of supplements is limited, and some supplements may actually reduce testosterone levels.

Chalkboard sign that says low testosterone sitting on a table in front of a book and supplements

CL Answer

Do plasmalogen supplements improve cognitive function and memory?

Plasmalogen supplements claim to improve cognitive function, support memory, and reduce brain fog. Find out if they work.

Hands holding puzzle in shape of head with puzzle pieces missing

CL Answer

What are the health effects of apigenin and is it safe?

Apigenin, a flavonoid compound, is promoted for sleep, depression, cancer, and other conditions. Find out if it works and if it's safe.

Apigenin capsules on wooden spoon along with a chamomile flower

CL Answer

Supplements For Back Pain: What Helps, What's Hype

Some supplements may provide modest benefit for back pain, while others don't seem to work or haven't been evaluated for this use. Find out if supplements like collagen, devil's claw, PEA, pregnenolone, white willow bark, and others help.

Man holding lower back due to low back pain

CL Answer

Do Vital 3 collagen drops reduce joint pain?

Learn more about Vital 3 collagen drops withundenatured type II collagen, and if they can help joints move better and feel better.

Bottle of Vital 3 Joint Solution

CL Answer

Which foods are a good source of B vitamins?

Find out which foods are a good source of B vitamins (like folate and B-12) and when you should take Vitamin B supplements.

Good Sources of B Vitamins -- selection of healthy foods including eggs, rice, nuts, seeds, salmon, chicken

CL Answer

Which supplements are helpful for age-related macular degeneration (AMD)?

Find out which vitamins & supplements are helpful for macular degeneration (AMD), such as lutein, zeaxanthin, and others used in the AREDS studies.

Supplements for Macular Degeneration -- woman getting eye examination

CL Answer

Are gummy vitamins better or worse than pills?

Learn more about gummy supplements, including those for multivitamins, vitamins C and D, calcium, and B vitamins.

Problems With Gummy Vitamins -- bottle of gummy vitamins

CL Answer

What is hydrogen water? Is it beneficial for alertness, athletic performance, arthritis or other conditions, and is it safe?

Find out if hydrogen water has benefits with regard to alertness, side effects of radiotherapy in cancer patients, metabolic syndrome, athletic performance, rheumatoid arthritis, liver disease, and other conditions, and learn if it is safe to use.

Portable hydrogen water generator

CL Answer

Which supplements can help treat anemia? Do any supplements cause a low red blood cell count?

Find out which vitamin and nutrient supplements can help prevent and treat anemia in people who are nutrient deficient and learn which supplements may cause low blood cell counts, especially when used in excess.

Woman holding various vitamins and supplements in her hands

CL Answer

What is hesperidin, what is it used for and is it safe?

Learn about hesperidin, including whether its beneficial for heart health, problems with circulation, stroke, cognitive function, depression, cancer and other conditions, and find out if it is safe.

A glass of orange juice sitting on a table and surrounded by sliced and whole oranges

CL Answer

What are the best bug sprays to prevent tick and mosquito bites? Is the insecticide permethrin safe to use?

Find out how permethrin sprays differ and which can be used on sheets and sleeping bags versus clothing

Variety of insect repellents on store shelf

CL Answer

Which vitamins and minerals should be taken together or separately?

Find out the best way to take vitamins and minerals and which vitamins and minerals should be taken together or separately for proper absorption. ConsumerLab answer explains the best way to take vitamins and minerals.

Vitamins & Minerals That Should Be Taken Together or Separately -- various vitamins in spoons

CL Answer

My doctor told me to stop taking supplements because my kidney function was low. After stopping, my kidney function returned to normal. Can taking a lot of supplements really damage the kidneys?

Find out which supplements may damage your kidneys. ConsumerLab explores possible kidney side effects of supplements including chromium, creatine, and vitamin C.

Can Supplements Really Damage Your Kidneys? -- Woman with kidney pain

CL Answer

Supplements to Take or Avoid When Using a GLP-1 Drug

Certain supplements may be helpful when taking a GLP-1 agonist, but others should be used with caution or avoided. It may also be important to monitor levels of certain vitamins and minerals. Get the details.

Semaglutide with supplements

CL Answer

Signal Relief Patches – Do They Really Relieve Pain and Are They Safe?

Signal Relief Patches are marketed as providing "drug-free pain relief for as little as 30¢ per day." Find out if they work and are worth the cost.

Signal Relief Patch

CL Answer

After taking a curcumin supplement, I started getting chronic diarrhea which went away when I stopped taking it. Can curcumin supplements cause diarrhea?

Learn more about the side effects of curcumin supplements, including diarrhea and other gastrointestinal discomfort.

Turmeric and Diarrhea

CL Answer

What is the ingredient zeolite I see in Natural Cellular Defense and other detox supplements? Does it help in any way?

Learn what zeolite is and why it is found in many detox supplements like Waiora's Natural Cellular Defense, Get Healthy Again Zeolite, and Ultra Liquid Zeolite.

Natural Cellular Defense

CL Answer

Is fish oil safe? Is it contaminated with mercury and PCBs?

Fish oil safety, including information on contamination with mercury and PCBs.

Is Fish Oil Safe? -- fish oil capsules up close

CL Answer

If I buy NAC as a loose powder in a large bag, as opposed to in tablet or capsule form, will it spoil? I've heard it can spoil or degrade into a harmful by-product.

Learn more about the different forms of N-Acetyl-Cysteine (NAC), including whether or not powder will spoil faster than tablets.

NAC Review 2026

CL Answer

I'm trying to pick a good multivitamin for my children and husband, and for myself. Any suggestions based on your research?

Find out how to pick the best multivitamin for you and your family, based on diet, price, and effectiveness.

Multivitamins Review 2026

CL Answer

Is hyaluronic acid helpful for osteoarthritis?

Hyaluronic acid supplement information including joint pain, osteoarthritis, clinical evidence, dosage and more.

Man Holding Knee from Knee Pain

CL Answer

Rhodiola and ashwagandha are both promoted to help with stress and anxiety. Is it safe to take them at the same time?

Find out if it is safe to take ashwagandha and rhodiola together. Both herbs are promoted to help with stress and anxiety, but may also lower blood pressure and have other side effects. ConsumerLab.com's answer explains.

Man in Light Blue Comparing Supplement Bottles

CL Answer

What is graviola? Can it really help fight cancer?

Learn more about graviola, if it can really help fight cancer, and its safety.

Graviola on white background

CL Answer

Does AZO Bladder Control really work for overactive bladder?

AZO Bladder Control information, including results from clinical studies on bladder control, dosage, and safety.

AZO

CL Answer

Is it okay to buy supplements as tablets? I've heard that tablets may go through our system without dissolving. Is there any way to know whether tablets will properly dissolve?

Find out if supplements taken as tablets dissolve well in the body, including our test results on disintegration.

Tablets

CL Answer

Can magnesium supplements reduce heart palpitations or PVCs?

Having low blood levels of magnesium has been associated with abnormal heart rhythms known as PVCs (premature ventricular complexes). Find out if taking magnesium supplements can help.

Magnesium and Palpitations (PVCs) -- Woman With Heart Palpitations

CL Answer

Does tea tree oil work for getting rid of athlete's foot?

Learn more about tea tree oil and its effects on foot fungus (known as athlete’s foot, tinea pedis, or “ringworm” due to the lesion that can occur) and how it can be as effective as some, but not all, over-the-counter antifungal treatments. ConsumerLab explains.

Tea Tree Oil for Athlete's Foot? -- Bottle of Tea Tree Oil

Product Review

Astaxanthin Supplements Review

See Which Astaxanthin Products Passed or Failed CL's Tests

Astaxanthin supplements reviewed by ConsumerLab.com

Product Review

Garlic Supplements Review

Find the Best Garlic Supplements. CL Tests Reveal Big Differences in Garlic Strength -- Some Have Little to No Garlic!.

Garlic Supplements Reviewed by ConsumerLab.com

Product Review

Coconut Waters Review

Best Coconut Water? See Our Tests and Comparisons of Popular Brands Looking at Sugar, Electrolytes, Taste and Price.

Coconut Waters Reviewed by ConsumerLab.com

CL Answer

Does red and near infrared light therapy reduce pain, improve skin or cognition, or have other benefits? Is it safe?

Red light and near infrared light therapy devices are promoted for numerous conditions, including acne, fibromyalgia, pain, cognitive function and other uses. Find out if these devices work and if they are safe.

Woman using a red light device on her lower leg

Product Review

Nutrition Bars Review (Protein, Energy, and Nut & Fruit Bars)

Our Tests Showed What's Hiding in Protein Bars

Nutrition Bars 2025 2

Recalls & Warnings

October 16, 2025

Ben’s Original Ready Rice Recalled

On October 10, 2025, Ben's Original issued a recall of certain batches of Ben's Original Ready Rice Long Grain White Rice, Ready Rice Whole Grain Brown Rice, and Ready Rice Long Grain & Wild Rice because they may contain small stones, which could potentially injure the mouth ...

Product Review

GABA Supplements Review

Does GABA Work As a Supplement?

Product Review

Cholesterol-Lowering Supplements Review (Sterols/Stanols and Policosanol)

Find the Best Cholesterol-Lowering Supplement. See Which Plant Sterol and Policosanol Supplements Passed Our Tests and Are Our Top Picks.

Sterol, Stanol, and Policosanol Supplements for Cholesterol-lowering Reviewed by ConsumerLab.com

Product Review

Vitamin A Supplements Review, Including Beta-Carotene and Cod Liver Oil

Find the Best Vitamin A Supplement. Best Quality Vitamin A Supplements Identified, Including Cod Liver Oil.

Vitamin A Supplements (Including Cod Liver Oil) Reviewed by ConsumerLab.com

CL Answer

What is Pycnogenol, does it work, and is it the same as other pine bark extracts?

Learn more about Pycnogenol, including evidence from clinical studies on blood clots, osteoarthritis, cognition, vision, tinnitus, and the skin and safety.

Pine bark extract

CL Answer

What is the best sunscreen based on safety and efficacy?

We’ve boiled down the latest research about mineral and chemical sunscreens, including product tests, to help you choose the best sunscreen (which will depend on whether you expect to be in or out of the water). We also list popular sunscreens that have, or have not, been found to contain cancer-causing compounds (benzene and benzophenone).

Carcinogens in Sunscreens - Bottle of sunscreen with a question mark

CL Answer

What are trace minerals and do I need them?

Trace minerals include boron, chromium, copper, iodine, iron, manganese, molybdenum, nickel, zinc, and others. Find out what they do, how much of each trace mineral you should be getting, and who's most likely to be deficient in these minerals.

Trace Minerals - What are they and do you need them?

CL Answer

Which deodorants and antiperspirants are contaminated with benzene and which are not?

Benzene, a carcinogen, has been detected in over 40 spray deodorants, antiperspirants, and body sprays. Tests were conducted on brands including Axe, Bath & Body Works, Brut, Degree, Dove, Gold Bond, Right Guard, Secret, Speed Stick, Suave, Old Spice, Victoria's Secret and others. Find out which products contained benzene, and how much they contained.

Benzene in Spray Deodorant

CL Answer

Do any supplements help prevent or improve cataracts?

Find out which supplements may help with cataracts, including selenium and vitamins A, B1, B3, C, and E.

Doctor Shining Light for Patient Eye Exam

CL Answer

Do any supplements help for varicose veins or chronic venous insufficiency?

Find out which supplements help for varicose veins and chronic venous insufficiency, including citrus bioflavonoids and grape seed extract.

Varicose Veins

CL Answer

I've heard that soaking dried beans for 24 hours reduces the phytate level, allowing for greater access to nutrients. Is this true?

Does soaking dried beans in water help reduce phytate levels to help gain greater access to nutrients?

Soaking Beans to Remove Phytates -- white beans soaking in a bowl of water

Product Review

Vitamin C Supplements Review

Find the Best Vitamin C Supplements

Vitamin C Review 2023

Product Review

CoQ10 and Ubiquinol Supplements Review

Find the Best CoQ10 and Ubiquinol Supplements and Learn How They Differ

CoQ10 2024

Product Review

Ashwagandha Supplements Review

Find the Best Ashwagandha Supplement. Only 38% of Ashwagandha Products Pass Tests.

Ashwagandha 2024

Product Review

Extra Virgin Olive Oil Review

Many Extra Virgin Olive Oils Don't Seem to Make the Grade

CL Answer

What is lumbrokinase, does it have heart benefits, is it safe, and what should you look for, or avoid, in a lumbrokinase supplement?

Lumbrokinase is marketed as promoting healthy circulation and supporting heart health. Find out how and if lumbrokinase supplements actually work, possible safety concerns, and what to consider when choosing a lumbrokinase supplement.

Capsules of lumbrokinase poured onto a black table

CL Answer

Are light boxes effective for preventing and treating seasonal affective disorder (SAD), also known as "winter depression," or circadian rhythm disorders such as jet lag? Which light boxes are best?

Learn about the benefits and safety of light boxes (including who is most likely to benefit), how to use these devices, which commercially available products appear to meet the technical requirements, and who should not use light boxes.

Man reading a book while sitting in front of a light box

CL Answer

What are the health benefits of andrographis? Can it treat colds, help with joint pain, or other conditions, and is it safe?

Learn about the health benefits of andrographis, whether it can help relieve cold symptoms, reduce pain and stiffness of osteoarthritis or rheumatoid arthritis, decrease symptoms of ulcerative colitis, or slow the growth of cancer. See the clinical evidence for the branded andrographis extract ParActin. Plus, learn about dosage, side effects and drug interactions with andrographis.

Andrographis

CL Answer

I read that turmeric may be a GI irritant. I have GI problems and wonder if I should avoid turmeric and curcumin?

Find out if turmeric/curcumin supplements can cause gastrointestinal irritability.

Is turmeric a stomach irritant? -- Turmeric Supplement

CL Answer

I have type 2 diabetes. Should I be concerned about ingredients like maltodextrin and maltitol that are found in some protein bars and drinks?

Learn more about maltitol and maltodextrin and their effects on blood glucose levels for people with type 2 diabetes.

Protein Bars and Powder

CL Answer

Do diamine oxidase (DAO) supplements for histamine intolerance really work?

DAO supplement info for histamine intolerance, including diamine oxidase safety, evidence from clinical studies, and dosage.

Person in Pink Shirt Scratching Arm

CL Answer

Which supplements have been shown to be helpful for autism, and which have not?

Find out which supplements may help reduce symptoms of autism, including multivitamins, probiotics, and melatonin.

Bottle and Pills Spread Out on Blue Background

CL Answer

Does Prelief Help with Heartburn or Bladder Pain Caused By Acidic Foods?

Learn about Prelief, a product promoted to reduce acidity from foods and drinks that may cause bladder pain, frequent urination, heartburn, or indigestion. Discover what Prelief claims to do, the clinical evidence supporting its use, and important safety considerations.

Bottle of Prelief Caplets and Container of Prelief Powder

CL Answer

LifeWave Patches: Do They Work?

LifeWave patches are promoted for numerous health benefits, but does research support these claims? Find out, and learn about possible safety concerns, cost, and controversies related to LifeWave patches.

LifeWave Patches

CL Answer

Is UpWellness Golden Revive + for Joint Support Worth It?

UpWellness Golden Revive + claims to offer relief for inflammation, muscle tension, and nerve pain. Find out if research supports these claims and if it's worth its price.

UpWellness Golden Revive Plus

CL Answer

Supplements for Attention-Deficit/Hyperactivity Disorder (ADHD): Are Any Helpful?

Dietary supplements are often explored as alternative options or add-on interventions for people with ADHD. Learn which, if any, have shown possible benefit and which don’t seem to help or may interfere with ADHD medication.

Dice spelling adhd

CL Answer

Capsimax for Weight Control: Does It Work & Is It Safe?

Capsimax, a cayenne pepper extract, is included in a number of supplements for weight loss. Find out if it works and if it's safe.

Chili peppers with capsimax

CL Answer

I am 70 a year male in relatively good health. I plan on walking the Camino in France (500 miles). I am looking for a multivitamin that would best supply me with my needs during this walk/hike. What would be the best product or combination of products to use?

Find out if older adults who walk or hike should take a multivitamin, vitamin C, vitamin D, or other supplements, like electrolytes, when hiking. Plus, see our advice for choosing a good sunscreen.

Hiking 8

CL Answer

Are There Supplements That Help Treat POTS (Postural Orthostatic Tachycardia Syndrome)?

Find out which supplements and lifestyle changes may be helpful for people with Postural Orthostatic Tachycardia Syndrome (POTS).

POTS

CL Answer

Should you take olive oil as a supplement?

Although extra virgin olive oil has many possible health benefits, such as reduced risk of heart disease and improved blood sugar control, these and other benefits have been demonstrated when olive oil replaces for saturated fats in the diet, not when taken as a supplement, as we explain.

Olive oil being poured into a spoon being held over a bowl

CL Answer

What are the health benefits of luteolin, and is it safe?

Find out if luteolin, a compound found in many fruits and vegetables, is beneficial for cancer, heart health, skin aging, age-related cognitive decline, and other conditions, and learn if it's safe.

Luteolin containing vegetables including celery peppers lettuce and spinach

CL Answer

What are the health benefits of grapefruit seed extract (GSE)? Is it safe?

Learn more about grapefruit seed extract health benefits, including its possible antifungal and antibacterial effects and its safety.

Grapefruit with Extract and Spoon

CL Answer

My HDL (good) cholesterol level is low. Should I take niacin to raise my HDLs?

Learn more about niacin and find out if it can raise HDL ("good") cholesterol levels.

Vitamin B3 Blister Packs

CL Answer

What is Noopept? Can it really improve memory and cognition, and is it safe?

Learn more about Noopept, including results from clinical studies on cognition, safety, and dosage.

Memory Cognition Image for Noopept

CL Answer

Does Alpha Brain really improve memory, focus and cognition?

Find out if Alpha Brain really improves memory, focus and cognition. See the clinical evidence and get details about Alpha Brain ingredients, as well as potential side effects and drug interactions. ConsumerLab.com's answer explains.

Bottle of Alpha Brain capsules

CL Answer

I have IBS and don't want to take medication if I can help it. I've heard that peppermint works for IBS, but is there good research to support this?

Information about using peppermint oil for irritable bowel syndrome (IBS), including clinical evidence, dosage, safety and more.

Peppermint Oil for IBS? -- Bottle of peppermint oil and capsules and peppermint leaf

CL Answer

Can white kidney bean extract lower blood sugar or help me lose weight?

Does white kidney bean extract help promote weight loss? Find out more including evidence from clinical studies and dosage.

White Kidney Bean Extract and Weight Loss -- White kidney beans

CL Answer

What is EpiCor? Does it really "boost" the immune system and prevent colds?

EpiCor supplement info, including evidence from clinical studies on immune function and cold/flu prevention, safety, and price.

Woman with Cold Holding Pill Bottle

CL Answer

Can fluoride in toothpaste, mouth rinses or drinking water cause attention-deficit/hyperactivity disorder (ADHD) or other neurodevelopmental disorders in children?

Find out if community water fluoridation increases the risk of attention-deficit/hyperactivity disorder (ADHD) or causes lower IQ in children, and learn what the American Dental Association recommends when using fluoride-containing toothpaste and mouth rinses in children.

Small amount of toothpaste being applied to a toothbrush with a glass of water in the background

CL Answer

Do essential amino acid (EAA) supplements help build muscle better than dietary protein or protein supplements?

Comparison of essential amino acids vs dietary protein and protein supplements for building muscle.

Hands holding essential amino acid capsules and protein powder

CL Answer

How good are sardines? Are they healthy and safe? What did CL's tests find?

Find out amounts of omega-3s (DHA and EPA), protein, and vitamin D in sardines, as well as contaminants mercury and arsenic based on ConsumerLab's tests.

Are Sardines Safe and Healthy To Eat? -- Can of Sardines

CL Answer

Which supplements and foods can help lower or control blood sugar?

Find out which supplements can help lower or control blood sugar. Supplements including turmeric/curcumin, fiber, cinnamon, and ginseng are believed to help lower blood sugar.

Blood Sugar Control -- blood test and blood sugar chart

CL Answer

Which supplements, foods or diet and lifestyle changes help relieve acid reflux (heartburn), and which worsen it?

Find out which supplements and foods can help relieve acid reflux, and which can make it worse.

Supplements Making Acid Reflux Worse -- Man with acid reflux pain

CL Answer

When taking a statin drug like Lipitor or Crestor, are there supplements I should avoid or take?

Learn about the interactions between certain supplements and atorvastatin (Lipitor), rosuvastatin (Crestor), and other cholesterol-lowering statins.

Statin Interactions With Supplements -- close-up of statin medication box and tablets

CL Answer

Which supplements or foods can help lower cholesterol and keep my heart healthy? Are there any to avoid?

Information about heart health supplements & vitamins that help with cholesterol, including sterol esters, CoQ10, and vitamin D, and which may be bad for the heart, like calcium.

CL Answer

7 Tips to Avoid Getting a Pill Stuck in Your Throat

Some pills can be difficult to swallow and can even become lodged in the throat or cause damage to the esophagus. Learn seven practical tips to help avoid getting pills stuck in the throat.

Pill Getting Stuck in Throat

CL Answer

5 Tips for Finding a Soap or Body Wash That Won't Irritate Skin

Get 5 tips for finding soap or body wash that won't cause skin irritation. See which soaps we rate best, ingredients to avoid, and phrases on labels that can mislead.

Different bars of soap on a marble countertop

CL Answer

Sugar Substitutes: Pros, Cons, and Best Choices

Learn about the pros and cons of using sugar substitutes and artificial sweeteners in place of table sugar. Sweeteners discussed include stevia, monk fruit, and other high-intensity sweeteners; xylitol, erythritol, allulose and other low-calorie sweeteners; and agave syrup, black sugar, coconut sugar, honey, molasses and other sugar alternatives.

Stevia Health Benefits & Safety -- stevia leaf spoonful of stevia

Product Review

Canned Tuna, Salmon, Sardines & Mackerel Review

Find Fish With the Least Mercury & Arsenic and Most Omega-3s

Canned Fish Review 2025

CL Answer

Do any supplements or lifestyle changes reduce the symptoms of tinnitus? Is it true that some supplements can cause tinnitus?

Learn which supplements can ease tinnitus, including melatonin and pine bark extract. Understand which may actually cause tinnitus.

Word blocks spelling out “tinnitus”

Product Review

B Vitamin Supplements Review (B Complexes, B6, B12, Biotin, Folate, Niacin, Riboflavin & More)

See Our Top Picks and Which 5 Failed Testing

B Vitamins Review 2024

CL Answer

PFAS (Per- and Polyfluoroalkyl Substances): How can I avoid PFAS in dental floss, food, water, and other products?

Some brands of dental floss may contain potentially toxic chemicals known as PFAS (polyfluoroalkyl substances). Get the details and learn which floss and pick products are our Top Picks.

Toxic PFAS Chemicals in Dental Floss -- Woman Looking at Dental Floss

Product Review

CBD Oils, Softgels, Gummies, Creams & Salves Review

See How Much CBD and THC We Found in Products.

CL Answer

Do hair loss supplements, such as Viviscal, Hair La Vie, and Nutrafol, or topical essential oils work?

Vitamins and supplements that may help with hair loss and thinning, including saw palmetto, beta-sitosterol, protein, iron, and vitamin D.

Supplements for Hair Loss -- woman looking at hairbrush

Product Review

Black Seed Oil Review

Find Out Which Black Seed Oil Supplements Passed or Failed Our Tests. See Our Top Picks.

Black Cumin Seed Oil Review 2025

Product Review

Milk Thistle Supplements Review

3,700% Difference Found Among Milk Thistle Supplements. Find the Best Milk Thistle Based on Our Tests and See Our Top Picks.

Milk Thistle Review 2025

Product Review

L-Arginine Supplements Review

Choose the Best L-Arginine Supplement. Find Out Which L-Arginine Supplement Passed CL's Tests.

L-Arginine Supplements Reviewed by ConsumerLab.com

Product Review

Sexual Enhancer Supplements Review (with Yohimbe, Horny Goat Weed, Arginine)

Choose the Best Sexual Enhancer Supplement. Only 30% of Selected Sexual Enhancement Supplements Pass Quality Tests.

Product Review

Iron Supplements Review (Iron Pills, Liquids and Chews)

See Which Iron Supplements Are CL's Top Picks for Different Needs

CL Answer

How concerned should I be about glyphosate in foods and supplements?

Find out if you should be concerned about glyphosate in foods and supplements. ConsumerLab.com's answer explains.

Glyphosate in Food -- bowl of oat o's cereal

CL Answer

Are Balance of Nature products good dietary supplements?

Do Balance of Nature supplements "Fruits" and "Veggies" supplements really provide the daily recommended servings of fruits and vegetables, and are they worth the cost? Find out.

Balance of Nature

CL Answer

What are the health benefits of palmitoylethanolamide (PEA), and is it safe?

Palmitoylethanolamide (PEA) is commonly promoted for its anti-inflammatory and pain-relieving effects. Find out if it works.

Woman holding her wrist due to joint pain

Product Review

Vitamin E Supplements Review

Find the Best Vitamin E Supplement. Tests and Reviews of Popular Vitamin E Supplements & CL's Top Picks.

Vitamin E Supplements, Cream, and Oil Tested by ConsumerLab.com

Product Review

NAC (N-Acetyl Cysteine) Supplements Review

Choose the Best NAC Supplement and Save Money

NAC Review 2026

Product Review

Psyllium Fiber Supplements Review

Find the Best Psyllium Fiber Supplement and Avoid Lead.

Psyllium Review 2024

Product Review

Lion's Mane and Chaga Supplements Review

Read Labels Carefully -- Many Can Mislead

Lion's Mane and Chaga Supplements tested by ConsumerLab.com

Product Review

L-Lysine Supplements Review

Read L-Lysine Labels Carefully. Some Can Fool You.

Product Review

Holy Basil Supplements Review

Find the Best Holy Basil (Tulsi) Supplements. Tests and Reviews of Popular Holy Basil Supplements & CL's Top Pick.

Holy Basil Supplements Reviewed by ConsumerLab.com

Product Review

Vitamin D Supplements Review (Including Calcium, Magnesium, Vitamin K, and Boron)

Find the Best Vitamin D Supplement and Avoid Problems

Vitamin D Review 2024

CL Answer

10 Supplements That May Help Reduce Nighttime Urination (And 5 That May Not)

Waking up more than once during the night to use the bathroom? Learn more about the 9 supplements that may help and 5 others that don't.

A toilet in an empty bathroom at night

CL Answer

Is topical menthol, such as Biofreeze, safe and effective for pain relief?

Menthol is commonly used in topical creams and gels for pain relief. Find out if it works and if it's safe.

Man applying menthol cream

CL Answer

Do any supplements help with restless legs syndrome?

Find out whether supplements or vitamins like iron, magnesium, vitamin E and others can help for restless leg syndrome (RLS). ConsumerLab.com's answer explains.

Supplements for Restless Legs Syndrome

CL Answer

Which supplements and foods help with gout and which may worsen it?

Find out about the effects on uric acid levels and gout of fish and fish oil, coffee, beer, animal meat, milk proteins, vegetable proteins, fructose, lemon juice, tart cherry juice, vitamin A, vitamin C, and niacin

Woman with gout pain rubbing her foot near the big toe

CL Answer

What is inositol hexaphosphate (IP6) and myo-inositol? Are they helpful in treating cancer or other conditions?

Inositol hexaphosphate (IP6): Find out if IP6 (also known as phytic acid) can prevent or treat cancer. Clinical evidence, dosage, safety and how IP6 differs from myo-inositol. Consumerlab.com's answer explains.

Wooden spoon filled with white inositol capsules

CL Answer

Is it better to get vitamins from foods or supplements, and are natural vitamins better than synthetic vitamins?

Learn more about the benefits of getting vitamins from food versus supplements, natural versus synthetic vitamins, and more.

Getting Vitamins and Minerals from Food vs. Supplements -- fruits, vegetables, and a spoon containing supplements on a table

CL Answer

Which supplements are best for seasonal allergies?

Find out which supplements are best for allergies and can help reduce seasonal allergy symptoms, including bromelain, curcumin, vitamin D, and CLA.

Supplements for Seasonal Allergies -- Woman Outside Sneezing

CL Answer

What are the health benefits of bovine colostrum and is it safe?

Bovine colostrum is promoted for boosting immunity, preventing and treating diarrhea, and improving gut health, but does it really work? See the clinical evidence for bovine colostrum, including doses that have been used, as well as safety concerns, cost considerations, and the difference between regular bovine colostrum and hyperimmune bovine colostrum.

Bovine colostrum powder and capsule supplements

CL Answer

Does urolithin A reduce age-related muscle decline, osteoarthritis, or other age-related diseases?

Find out if urolithin A may improve age-related muscle decline and learn about its safety.

Older couple walking together to exercise

Product Review

Dark Chocolates, Cocoa Powders and Supplements Review

Many Dark Chocolates and Cocoa Powders Fail Safety Tests

Cocoa and Dark Chocolate Review 2025

CL Answer

Dandelion Tea & Supplements: Health Benefits and Safety

Find out about the potential health benefits of dandelion tea and supplements, as well as safety, side effects, and potential drug interactions.

A cup of dandelion root tea on wooden background

CL Answer

Does AHCC or active hexose correlated compound have anticancer or antiviral benefits, and is it safe?

Learn about AHCC and active hexose correlated compound, including whether these compounds are beneficial for liver, pancreatic, or prostate cancer, chemotherapy-related side effects, or the flu. Also, find out if AHCC or active hexose correlated compound are safe.

Capsules of AHCC in wooden spoon in front of green leaf

CL Answer

Can any supplements improve or worsen symptoms of fibromyalgia?

Find out if any supplements may help improve fibromyalgia symptoms, learn which supplements do not seem beneficial, and find out if any supplements worsen symptoms.

Woman holding sore back

CL Answer

Does Provitalize work for weight loss and is it safe?

Find out if taking Provitalize, a probiotic supplement that also contains turmeric extract, moringa leaf extract, curry leaf extract and piperine (BioPerine), relieves joint pain, decreases abdominal fat, or helps with weight loss.

A bottle of Provitalize

CL Answer

Does Neuriva improve memory or cognitive function?

Find out about Neuriva, its ingredients, and the evidence for or against it for memory and cognitive function.

Bottles containing capsules of Neuriva Original and Neuriva Plus

CL Answer

What is UC-II and does it help joints?

What is UC-II (undenatured type 2 collagen - InterHealth Nutraceuticals) and do clinical studies show that it works for joint health?

UC-II Collagen for Joint Pain? -- man with knee pain

CL Answer

Is there a danger in taking lecithin or phosphatidylcholine? I heard that they may increase the risk of heart attacks.

Lecithin, phosphatidylcholine and choline - Learn more about the potential link between them and cardiovascular disease.

Increased Heart Risk

CL Answer

Do probiotics need to be refrigerated?

Refrigerating certain probiotic pills and other probiotic supplements is important. Get tips on how to store probiotics properly.

Do probiotic pills require refrigeration? -- Probiotic supplement

CL Answer

What supplements should I stop taking before surgery?

Info on which supplements to avoid before surgery due to increased risk of bleeding or interference with anesthesia.

Supplements to stop before surgery - operating room

CL Answer

What are the health benefits of coconut oil and medium chain triglycerides, such as those used in Bulletproof Coffee?

Learn the health benefits of coconut oil and medium chain triglycerides (MCTs), including evidence from Bulletproof Coffee, clinical studies on obesity, skin, and Alzheimer's disease.

Coconut Oil & MCTs -- Coconuts and coconut oil with coffee cup

CL Answer

Is sublingual vitamin B-12, which is placed under the tongue and allowed to dissolve, really better than the pill form?

Learn the difference between sublingual vitamin B-12, vitamin B-12 pills and more through information including clinical evidence.

Sublingual B-12 vs. Vitamin B-12 Pills -- B-12 supplements

CL Answer

What is monolaurin? Can it really prevent colds, cold sores, or other infections?

Lauricidin (monolaurin) information for preventing colds, immune system function, and safety.

Lauricidin (monolaurin) for Colds -- jar of Lauricidin

CL Answer

How can I find out where a vitamin or supplement is made and where its ingredients come from, such as China or the USA?

Learn more about the manufacturing, distribution, and ingredients of a supplement, including FDA regulations.

How to Find Out Where A Supplement Is Made -- Supplement Label

CL Answer

I've tried a number of fish oil supplements, all of which make me nauseous. What is the best non-fish alternative? I am primarily interested in getting EPA.

Learn how to reduce fish oil side effects such as nausea and upset stomach.

Disgusted Woman Holding Fish Oil

CL Answer

Do any supplements help relieve stress?

Are there actually supplements for stress relief and panic attacks? Learn more about holy basil, fish oil, L-theanine, and ginseng.

CL Answer

Which supplements help reduce the risk of colorectal cancer?

Find out which supplements may reduce the risk of colorectal cancer, including folate, fiber, selenium, and vitamin D.

Supplements and Colorectal Cancer Risk -- colon cancer diagnosis form and supplements

CL Answer

Which supplements help with erectile dysfunction?

Supplements for erectile dysfunction. Find out which supplements can help with ED, including ginseng, L-arginine, and maca.

Man in Grey Tee Holding Water and White Supplement

CL Answer

Are cranberry supplements helpful for men? Can they help with symptoms of an enlarged prostate, prostatitis, or urinary tract infections?

Learn more about how cranberry pills, cranberries, cranberry juice and supplements can help prevent urinary tract infections.

Cranberry Supplements for Men? -- Bottle of cranberry capsules

CL Answer

Can lemon juice, lemonade, or other juices reduce my chances of getting kidney stones?

Information about lemon juice, lemonade, orange juice, cranberry juice and other juices for increasing urinary citrate and reducing the risk of kidney stones.

Lemon juice for kidney stones? -- glass of lemon juice and lemons

CL Answer

What are the side effects of red yeast rice?

Find out which side effects can be caused by red yeast rice supplements that are taken to lower cholesterol levels. ConsumerLab.com's answer explains.

Red Yeast Rice Side Effects

CL Answer

Can prenatal vitamins have too much folic acid? Mine has 800 mcg, but isn't that more than what's recommended? Is this dangerous to me or my baby?

Is it possible for prenatal vitamins to have too much folic acid? Find out the correct dosage so that it is not dangerous to babies.

Too Much Folic Acid in Prenatal Vitamins? -- Pregnant woman taking supplements

CL Answer

Do detox foot pads or ionic foot baths remove heavy metals or other toxins from the body?

Detox foot pads and ionic foot baths are promoted for removing heavy metals and other toxins from the body. Find out if there is evidence to support these claims.

Woman lying in bed wearing detox foot pads

Product Review

Multivitamin and Multimineral Supplements Review

32% Failed our Tests. Choose Your Multivitamin Carefully.

Multivitamins Review 2026

CL Answer

Which is the best mask to prevent COVID-19 and how do cloth, disposable, N95, and KN95 masks compare? How can I stop glasses from fogging?

See our Top Picks for masks. Learn how to make COVID-19 masks from materials at home that can be almost as effective as surgical mask and N-95 masks.

Four masks shown for comparison

News Release

September 12, 2025

ConsumerLab Tests Identify Best Milk Thistle Supplements

White Plains, NY, September 12, 2025 – Some milk thistle supplements may contain far less silymarin than a consumer might expect from labels, according to recent ConsumerLab tests.

News Release

December 20, 2024

Best Zinc Supplements and Lozenges for Colds, According to ConsumerLab

White Plains, NY, December 20, 2024 —  Zinc is important for a healthy immune system and the right zinc lozenge can help reduce cold symptoms, but taking too much zinc causes adverse effects.

News Release

February 29, 2024

Lead Found In Psyllium Fiber Supplements

White Plains, NY, February 29, 2024 —  Psyllium is an effective laxative that may also have heart health benefits, but ConsumerLab’s recent tests found lead contamination in every psyllium fiber supplement it purchased and tested.

News Release

July 26, 2023

Best Collagen Supplements for Skin and Joints, According to ConsumerLab Tests

White Plains, New York, July 26, 2023 —  Collagen supplementation may modestly reduce wrinkles and the appearance of cellulite, and moderately decrease joint and tendon pain and improve flexibility in people with osteoarthritis.

Product Review

Turmeric and Curcumin Supplements and Spices Review

See Our Top Picks Among Turmeric Products

Turmeric Review 2025

Product Review

Fish Oil, Krill Oil, and Algal Oil Omega-3 (DHA & EPA) Supplements Review

See Our Omega-3 Top Picks and Avoid Rancid Fish Oils.

Fish Oil and Other Marine Oil Supplements Reviewed by ConsumerLab.com

CL Answer

Here’s What You Should Look For In Toothpaste and Mouthwash, and Our Top Picks

Learn about ingredients you want in your toothpaste, mouthwash and other dental products and which ingredients you may want to avoid.

Toothpaste in the shape of question mark coming out from toothpaste tube

News Release

March 28, 2023

Expanded Flaxseed Testing by ConsumerLab Reveals More Cadmium Contamination – Several Quality Products Also Identified

White Plains, New York, March 28, 2023 — Due to concerning levels of cadmium ConsumerLab discovered in its tests of flaxseed products in January 2023, ConsumerLab recently purchased and tested seven additional whole and ground flaxseed products.

Recalls & Warnings

April 02, 2026

Kian Pee Wan Capsules Recalled

On March 30, 2026, Aphreseller, a seller on eBay, announced a nationwide recall of all lots of Kian Pee Wan capsules after FDA testing found that the product contained undeclared drug ingredients, dexamethasone and cyproheptadine, which are not permitted in dietary supplements.

Recalls & Warnings

March 20, 2026

Salmonella Outbreak Update: 97 Cases Linked With Moringa Leaf Supplements

On March 17, 2026, the FDA and CDC announced that a joint investigation of a multi-state Salmonella outbreak has concluded.

Product Review

Vision Supplements Review (with Lutein, Zeaxanthin & AREDS2 Formulas)

Find the Best Vision Supplement Based Our Tests

Product Review

Manuka Honey Review

Find the Best Manuka Honey Based on Quality, Taste, and Value. See our Top Picks.

Manuka Honey Review

Product Review

Choline and Lecithin Supplements Review (Including Phosphatidylcholine, CDP-Choline, and Alpha-GPC)

Choose the Best Choline Supplement. Find Out How Much Choline Popular Supplements Really Provide.

News Release

January 12, 2023

High Levels of Cadmium Found In Whole and Ground Flaxseed In ConsumerLab Tests

White Plains, New York, January 12, 2023 — Recent ConsumerLab tests revealed concerning levels of cadmium, a toxic heavy metal, in several popular flaxseed products which, otherwise, provided the listed amounts of healthy fats, fiber, and protein without microbial contamination.

CL Answer

Which supplements and foods reduce or increase the risk of kidney stones?

Find out which supplements, foods and beverages may increase or decrease the risk of kidney stones, including information about potassium, calcium, choline, turmeric and curcumin, vitamin C, as well as foods and beverages such as green tea, lemon juice, orange juice, cranberry juice, chocolate and almonds.

Supplements for Kidney Stones

CL Answer

Can supplements, natural eye drops, or lifestyle modifications improve symptoms of dry eye?

Can supplements such as fish oil, flaxseed oil or curcumin (from turmeric) help treat dry eyes? Find out, including formulas and doses that have shown benefit. Also, learn if drinking more water or using eye drops containing castor oil, N-acetylcarnosine or aloe can help with dry eye.

Older man with dry eye rubbing his eyes while holding his glasses

CL Answer

Which supplements help with arthritis?

Learn more about supplements for joint health, including products such as Wobenzym and Zyflamend and ingredients such as collagen, curcumin, devil's claw, glucosamine and chondroitin, hyaluronic acid, magnesium, omega-3 fatty acids, palmitoylethanolamide (PEA), SAMe, and others.

Supplements for Osteoarthritis and Rheumatoid Arthritis -- Women With Arthritic Hands

CL Answer

Do any supplements or diets help prevent or treat osteoporosis?

If you have osteoporosis, you may be interested in supplements or diets for bone health. Find out which can increase bone strength and density.

Doctor discussing osteoporosis with older female patient

CL Answer

Are fruit and vegetable “washes” or devices more effective than water for cleaning produce and removing pesticides? Are they safe?

Fruit and veggie washes, vinegar, and baking soda, as well as devices that use electrolysis, ozone water, or ultrasonic cleaning, are often promoted for removing dirt, bacteria and pesticides from produce. Find out if any work better than rinsing with water and if they are safe.

Fruits 3

Product Review

Fruits, Veggies, and Other Greens Supplements Review (Including Spirulina and Chlorella)

Avoid Lead in Greens, Problems with Pills, and Don't Give Up Eating Whole Foods.

Greens Review Oct 2023

CL Answer

Which supplements and lifestyle changes improve sleep, and which cause insomnia?

Find out which vitamins may help you sleep and learn if any vitamins or supplements can cause insomnia.

CL Answer

Do any supplements help with fatty liver disease? Are some diets better than others?

Find out if supplements such as vitamin E, fish oil, milk thistle, curcumin, choline, probiotics, vitamin D, reishi mushroom, or extra virgin olive oil are beneficial for fatty liver disease and learn which diet (Mediterranean, ketogenic, DASH, or fasting diets) seems to have greatest benefit.

Overweight man holding his right side near his liver

CL Answer

What is acrylamide? Is it true that coffee and cocoa contain this toxin?

Find out what acrylamide is, how much is found in coffee and cocoa, and how you can minimize your intake of acrylamide.

Acrylamide in Coffee, French Fries & Cookies

CL Answer

Which foods and supplements contain lead, cadmium, or arsenic?

Discover which foods and dietary supplements contain lead and other metals, the limits, who’s testing, and how to stay safe.

Lead in Supplements & Foods -- concerned woman looking at pill

Recalls & Warnings

June 27, 2024

“Authentic” Rose Oil Often Is Not

Damask rose essential oil (Rosa × damascene) and products claiming to contain this oil, or “authentic rose oil” may often be adulterated or contain less expensive oils instead, according to a recent bulletin from the American Botanical Association (ABC).

News Release

February 10, 2022

Best Iron Supplements for Different Needs? ConsumerLab Selects Its Top Picks

White Plains, New York, February 10, 2022 — With so many different forms and doses of iron available from supplements, it can be difficult for consumers to know which best suits their needs.

News Release

February 12, 2021

Don't Be Surprised by New Labels on Many Vitamins

White Plains, New York, February 12, 2021 — It took almost four years, but more accurate labels on vitamin and mineral supplements are finally here and consumers should not be surprised to see changes, says Tod Cooperman, M.D., president and founder of ConsumerLab.

News Release

November 24, 2020

Best Zinc for Colds, Immunity, and More. ConsumerLab Selects Top Picks Among Zinc Liquids, Pills and Lozenges

White Plains, New York, November 24, 2020 — The right zinc can shorten a cold and many people are deficient in zinc. So which zinc supplements and lozenges provide the right dose and form of zinc, the best quality, and at a reasonable price?

CL Answer

Best Supplements to Prevent Age-Related Muscle Loss

Discover the top supplements to prevent age-related muscle loss after 60. Learn how protein, fish oil, vitamin D, and more can help maintain muscle strength and combat sarcopenia.

Protein Review 2026

CL Answer

Do any supplements help prevent or reduce eye floaters?

Find out eye floaters (vitreous floaters) be treated with supplements like vitamin C, lutein, ginkgo, milk thistle, collagen or hyaluronic acid, or with products such as VitreousHealth.

How to Reduce Eye Floaters With Vitamins & Supplements -- Close-up of an eye

CL Answer

Do any supplements help for ulcerative colitis?

Find out what supplements & vitamins can help with ulcerative colitis, such as VSL#3, curcumin, aloe or boswellia.

Woman Grabbing Stomach Due To Abdominal Discomfort

CL Answer

Do brain games and apps really work and improve memory?

Find out if brain training games & apps, like Lumosity & BrainHQ, really work to train the mind and improve memory. ConsumerLab.com's answer explains.

Do brain games really improve memory? -- hand holding smartpphone with game app

CL Answer

Can any vitamins or minerals help prevent or reduce canker sores or cold sores?

Find out which, if any, supplements, including iron, L-lysine, monolaurin, olive leaf extract, vitamin B-12, and zinc, may be beneficial for canker sores or cold sores.

Lip of woman with a cold sore

CL Answer

Which oils can help lower my cholesterol and risk of heart attack? How are coconut oil, olive oil, and fish oil for example?

Find out which fats and oils, such as coconut oil and fish oil, lower cholesterol and lower the risk of cardiovascular disease.

Oils and Heart Health

CL Answer

Is there a risk of liver toxicity with certain supplements?

Find out if there is risk of liver damage from supplements such as green tea, niacin, red yeast rice and vitamin A.

Liver Shape Made From Paper with Pills and Bottle Against Blue Background

CL Answer

Do supplements help with Parkinson’s disease treatment or prevention?

Learn what has been shown with vitamins D and E, niacin, CoQ10, melatonin, creatine, SAMe, NAC, valerian, CoQ10, and CBD, as well as with coffee and the Mediterranean and MIND diets for treating and/or preventing Parkinson's disease.

Elderly man with parkinsons holding trembling hand while eating

CL Answer

What is Perque Bone Guard Forté? It is safe and effective for bone health?

Find out about the ingredients in Perque Bone Guard Forté, including which ingredients may be beneficial for osteoporosis and bone health and which may be a safety concern.

Bottle of Perque Bone Guard Forte

CL Answer

Can any supplements be used to reduce inflammation in people sensitive to NSAIDs such as ibuprofen, high-dose aspirin, or naproxen?

Find out if supplements such as turmeric, fish oil, MSM (methylsulfonylmethane), SAMe (S-adenosyl-methionine), boswellia, ginger, white willow bark or arnica may, or may not, be helpful to people sensitive to NSAIDs.

Woman with NSAID-hypersensitivity looking at two supplement containers and wondering if they are safe to take

CL Answer

Can taking too much vitamin B-6 be dangerous?

Find out if multivitamins contain excessive amounts of B-6, how much B-6 is too much, and symptoms of toxicity and overdose.

Vitamin tablets placed on a table to spell B6

CL Answer

What is C15:0 fatty acid (found in fatty15), and does it have health benefits?

C15:0 fatty acid in fatty15 is promoted for “healthier hair & skin, balanced metabolism, and deeper sleep,” as well as “slowing the aging process.” Find out if it works.

Bottle of fatty15 with white background

CL Answer

Dimethyl sulfoxide (DMSO): Health Effects & Safety Concerns

Dimethyl sulfoxide (DMSO) is a colorless liquid promoted for osteoarthritis, interstitial cystitis, tennis elbow, rotator cuff tendonitis, wound healing, and many other conditions. Find out if it works and if it's safe.

Man applying DMSO gel to knee

CL Answer

Magnesium L-Threonate (Magtein): Health Effects & Safety

Magnesium L-threonate (Magtein) is promoted for boosting memory and cognition, improving mood, supporting sleep, reducing stress and improving symptoms of attention-deficit/hyperactivity disorder (ADHD). Find out if it works and if it's safe.

Woman holding two capsules of magnesium l-threonate

CL Answer

Supplements That May Be Needed When Following a Gluten-Free Diet

Find out if supplements such as folate, vitamin B-12, niacin, thiamin, iron, vitamin D, and/or fiber are needed when following a gluten-free diet. Also learn how to find gluten-free supplements on ConsumerLab.com.

Woman holding her hand in front of a slice of bread to signify a gluten free diet

CL Answer

Does methylene blue increase energy, slow aging, or improve memory?

Methylene blue is promoted for increasing energy, slowing aging, and improving memory. Find out if there is evidence for this, plus safety and side effects.

Methylene Blue 1

CL Answer

Are David Beckham’s IM8 Supplements Worth Taking?

IM8 markets two main products that claim to help you "feel amazing today," and "stay young tomorrow." Find out if these products work and if we think they're worth the cost.

IM8

Recalls & Warnings

October 02, 2023

Dangerous Ingredients Found in Ten Arthritis and Pain Supplements

On September 29, 2023, the FDA warned consumers that the following arthritis and pain management products contain undeclared drugs such as diclofenac, methocarbamol (a muscle relaxant), and dexamethasone (a corticosteroid), and/or other potentially harmful ingredients.

News Release

March 12, 2020

ConsumerLab Tests Reveal Big Differences Among Elderberry Supplements

White Plains, New York, March 12, 2020 — Elderberry extracts have long been promoted for fighting colds and flu, and, more recently, as a natural remedy for coronavirus (COVID-19).

News Release

June 25, 2019

ConsumerLab Tests Reveal Best B Vitamin Supplements -- 19% of B Vitamin Supplements Fail CL's Tests of Quality

White Plains, New York, June 25, 2019 — B vitamins and complexes are among the most popular supplements sold in the U.S. because B vitamins are essential for a wide range of functions in the body.

News Release

February 24, 2019

CBD and Collagen Rise in Popularity, as Probiotics and Coconut Oil Dip in Latest ConsumerLab Survey of Supplement Users

White Plains, New York, February 24, 2019 — A recent survey of 10,931 people who use dietary supplements shows that CBD oil (+6.3 percentage points), collagen (+3.6 pts), and bone broth (+2.

News Release

October 19, 2017

ConsumerLab.com Reveals Best Zinc Lozenges and Supplements for Shortening Colds and Correcting Deficiency

White Plains, New York, October 19, 2017 — In the U.S., mild zinc deficiency is fairly common. Zinc supplements can help to correct a deficiency, slow the progression of age-related macular degeneration, and have other benefits. Taken as a lozenge, zinc can shorten the duration of a cold.

News Release

June 21, 2017

Which Magnesium Is Best? ConsumerLab.com Tests Popular Brands and Reveals Its Top Pick

White Plains, New York, June 21, 2017 — Magnesium supplements are among the most popular supplements, but do you need to take one and, if so, which is best? To find out, ConsumerLab.com reviewed the clinical evidence, and purchased and tested popular magnesium supplements sold in the U.S.

News Release

May 26, 2017

ConsumerLab.com Tests Reveal the Best Calcium Supplements

White Plains, New York, May 26, 2017 — Most people know that calcium is important for building and maintaining strong bones, but with so many different forms, dosages and ingredient combinations available on the market, choosing a calcium supplement can be difficult. To help, ConsumerLab.

News Release

May 17, 2017

Best Vitamin D? ConsumerLab.com Tests Popular Vitamin D Supplements and Reveals Its Top Picks

White Plains, New York, May 17, 2017 — Vitamin D is currently the most popular dietary supplement among people who regularly use supplements according to a recent survey by ConsumerLab.com.

News Release

March 15, 2017

ConsumerLab.com Reveals Best and Worst Vitamin C Supplements -- 20% Fail ConsumerLab.com Tests of Quality

White Plains, New York, March 15, 2017 — Many people take large doses of vitamin C believing it will improve their health, prevent colds or reduce the risk of disease — but will it really? And when choosing a vitamin C supplement, can consumers be sure it contains what it claims? To ...

News Release

December 10, 2014

ConsumerLab.com Identifies Best Zinc Products for Colds, Eyes, and Zinc Deficiency -- Popular Zinc Supplements and Lozenges Tested and Compared

White Plains, New York, December 10, 2014 — "Zinc supplements have been shown to shorten colds and reduce the progression of advanced macular degeneration, but not all products provide the dosage proven effective, as well as pass criteria for supplement quality," says Tod Cooperman, M.D.

News Release

January 29, 2014

You May Be Getting More Vitamin C Than You Think from Some Supplements, Cautions ConsumerLab.com -- 27% of Vitamin C Supplements Don't Meet Label Claims in Recent Tests --

White Plains, New York, January 29, 2014 — It's cold and flu season, which means many people are reaching for vitamin C, as it may modestly reduce cold symptoms (although it won't prevent a cold).

News Release

January 17, 2012

Do African mango supplements help with weight loss? ConsumerLab.com investigates the evidence

White Plains, New York — January 17, 2012 — African mango supplements are touted to help shed pounds, but do they really work? "Long-term weight loss with African mango has not been proven," said says Tod Cooperman, M.D., President of ConsumerLab.

News Release

December 20, 2011

Choose zinc supplements carefully -- ConsumerLab.com finds only some have dosage proven to shorten colds, reduce eye disease

White Plains, New York — December 20, 2011 — Can zinc supplements shorten colds and reduce the progression of advanced macular degeneration? "Yes, but not all supplements provide a dosage that has been proven effective." says Tod Cooperman, M.D., President of ConsumerLab.com.

News Release

October 13, 2011

30% of SAM-e supplements selected for review fail to pass ConsumerLab.com testing -- Cost of SAM-e found to vary 5-fold

White Plains, New York, October 13, 2011 — Dietary supplements with SAMe (S-adenosyl-methionine) are used to treat osteoarthritis as well as depression, but only 7 out of ten SAM-e supplements recently selected for testing by ConsumerLab.com met all quality criteria.

News Release

August 31, 2011

ConsumerLab.com analyzes supplements for sexual dysfunction -- Only three out of ten products selected for testing pass

WHITE PLAINS, NEW YORK — August 31, 2011 — Only three out of ten supplements selected for testing that are for sexual enhancement passed ConsumerLab.com's latest investigation.

News Release

October 26, 2010

ConsumerLab.com reports deficiencies in some B-complex supplements and more caffeine than expected in "shot-sized" B vitamin "energy" drinks

White Plains, New York — October 26, 2010 — Tests of B vitamin supplements, including B-complexes and shot-sized energy drinks, revealed problems with the quality of 4 out of 18 products selected for review by independent testing organization ConsumerLab.com.

News Release

August 25, 2009

ConsumerLab.com tests quality of acai berry supplements and beverages -- No contamination found but health benefits remain unproven. Caution urged with laxative formulas and billing schemes.

White Plains, New York — Tuesday, August 25, 2009 — Acai berries have antioxidant properties and are a staple of the traditional Brazilian diet. In recent years, supplements and drinks made from acai have become popular in the U.S.

News Release

March 31, 2009

ConsumerLab.com Warns of Problems with Multivitamins and Vitamin Water -- Defects Found in Over 30% of Supplements Selected for Testing; Several Popular Children's Multis Exceed Tolerable Upper Intake Levels

WHITE PLAINS, NEW YORK — MARCH 31, 2009 — Over 30% of multivitamins recently selected for testing by ConsumerLab.com were found to contain significantly more or less ingredient than claimed or were contaminated with lead.

CL Answer

I take levothyroxine (Synthroid), a thyroid hormone to treat hypothyroidism. Are there supplements or foods I should avoid, or be taking, due to this drug?

Is taking certain supplements and hypothyroidism medications bad? Learn which supplements can interact with thyroid hormone medications like levothyroxine (Synthroid), thyroid hormone levels, and laboratory tests.

Levothyroxine (Synthroid) Supplement Interactions

CL Answer

Do any supplements help with COVID-19? Do supplements like vitamin D, zinc, vitamin C, or herbals work?

Find out if natural remedies & supplements for coronavirus such as zinc, vitamin C, garlic, or elderberry help to prevent or treat COVID-19.

Supplements for Coronavirus (COVID-19)? -- mask and pills

Recalls & Warnings

May 28, 2024

Fiji Water Recalled

On March 3, 2024, Natural Waters of Viti Limited issued a recall of over 78,000 cases of Fiji Natural Artesian Water 500 mL (24 pack) after firm testing found the presence of manganese, as well as bacteria.

CL Answer

All About Thyroid Supplements & Desiccated Thyroid Extract (Armour Thyroid)

Learn about supplement ingredients such as iodine, selenium, zinc, acetyl-l-carnitine, ashwagandha and guggul used for thyroid conditions and find out if they are beneficial. Also learn why ingredients such as alpha-lipoic acid, soy, resveratrol, quercetin may impair thyroid function.

Woman holding various vitamins and supplements in one hand and glass of water in the other

CL Answer

Where to Safely Buy Real Vitamins and Supplements Online, Not Fakes or Counterfeits

ConsumerLab explains how to avoid counterfeit vitamins and supplements when shopping online on Amazon, Walmart.com, and other sites. Learn to identify authorized sites and sellers and avoid fake supplements. Use the brand-by-brand guide to protect yourself from risk.

Woman in Orange Sweater

CL Answer

Which is the best pulse oximeter for home use?

Best pulse oximeter for home use (COVID-19, asthma and COPD). Differences between home use and FDA-approved medical pulse oximeters.

Best Pulse Oximeter for Home Use -- Pulse Oximeter

CL Answer

Is it safe to drink coffee regularly? Does drinking coffee increase or decrease the risk of cancer?

Learn more about coffee, its safety, if it's good for you, and if it impacts your risk of cancer.

Is it Safe to Drink Coffee Regularly

CL Answer

Do any supplements help for flu?

Which supplements may help prevent or reduce symptoms of colds or the flu, including vitamin D, ginseng, NAC, and elderberry.

Supplements for Flu -- women with the flu sitting on couch with tissues, thermometer, warm drink

CL Answer

Do any supplements or foods help prevent sunburn or skin damage from sun exposure? Can any increase your risk of sun-related skin damage?

Find out which supplements may help protect from sunburn and sun-related skin damage, including beta-carotene, vitamins A and C, and cocoa.

Dermatologist examining the skin on the back of an older woman for signs of sun damage or skin cancer

CL Answer

Do any supplements, like Nervive, help with nerve pain, like sciatica, diabetic neuropathy or postherpetic neuralgia?

Find out which supplements for nerve pain, including fish oil and alpha-lipoic acid, are effective for sciatica, diabetic neuropathy, or postherpetic neuralgia.

CL Answer

What are the best supplements for depression and anxiety?

Best natural supplements for depression and anxiety, including the evidence for fish oil, vitamin D, probiotics, and herbal supplements for depression such as curcumin (from turmeric) and saffron.

Best Supplements for Depression and Anxiety -- sad young woman sitting on couch, looking toward the window

CL Answer

Which supplements and foods help relieve constipation and which can cause constipation?

Find out which supplements can cause constipation, including iron, calcium, protein powders and drinks and others. ConsumerLab.com's answer explains.

Which supplements can cause constipation? -- Woman with gastrointestinal pain

CL Answer

Do any supplements help for irritable bowel syndrome (IBS)?

IBS supplements may help reduce irritable bowel symptoms such as pain, diarrhea and constipation. Supplements include probiotics, melatonin, and flaxseed.

Supplements for IBS? -- Women With Stomach Pain

CL Answer

ConsumerLab’s Review of ION* Gut Support

ConsumerLab's Review of ION Gut Support (formerly Restore), the liquid humic extract supplement derived from soil. Learn about the evidence for ION Gut Support for on digestion and gut health, reducing inflammation, and other uses, dosage, cost, and safety.

ION Gut Support 3

CL Answer

Can any supplements reverse gray hair?

Nearly 75% of adults aged 45 to 65 are affected by gray hair. Learn about what causes gray hair and find out if any supplements can help.

A young woman shows gray hair on her head on a white background

News Release

December 09, 2008

Tests of zinc supplements by ConsumerLab.com show only some provide dosage proven to shorten colds, reduce eye disease. Lead contamination found in one product.

WHITE PLAINS, NEW YORK — DECEMBER 9, 2008 — Zinc supplements can shorten colds and reduce the progression of advanced macular degeneration, among other uses. But a new report by ConsumerLab.

News Release

March 07, 2008

ConsumerLab.com finds most vitamin C supplements pass quality tests but one short on ingredient and some exceed tolerable levels

WHITE PLAINS, NEW YORK — MARCH 7, 2008 — ConsumerLab.com reported test results today for a wide variety of vitamin C supplements. Vitamin C is the top-selling single vitamin in the U.S., with sales of $863 million in 2006 according to Nutrition Business Journal.

News Release

October 20, 2006

ConsumerLab.com report on CoQ10 supplements finds quality high but large range in suggested dosage

WHITE PLAINS, NEW YORK — OCTOBER 20, 2006 — New test results from ConsumerLab.com for CoQ10 supplements show that all of the products selected contained amounts of ingredient consistent with their labels.

News Release

November 15, 2005

Testing by ConsumerLab.com identifies many problems with popular supplements for weight loss, slimming, and blood sugar control

Westchester, NY — November 15, 2005 — In a series of reports released today, ConsumerLab.com revealed test results for supplements used for weight loss, slimming, and blood sugar control. Among the twenty-three products that ConsumerLab.

Recalls & Warnings

September 14, 2023

FDA Warns CVS, Walgreens, Similasan & Others for Eye Drop Violations

On September 11, 2023, the FDA issued Warning Letters to the following eight sellers of homeopathic and other types of eye drops regarding the products noted in italics due to a variety of violations of FDA regulations, most notably that they were marked with claims suggesting that they could cure, ...

Recalls & Warnings

November 16, 2023

Toxic Levels of Lead Found in Cinnamon Applesauce

WanaBana, Schnucks, and Weis apple cinnamon fruit puree pouches have been recalled after being linked, as of December 5, 2023, to 64 reports of illness, including four children with potential lead toxicity.

Recalls & Warnings

May 08, 2024

APG SEVEN Warned for Promoting Products for Cancer, Depression, Arthritis, & More

On April 18, 2024, the FDA issued a Warning Letter to APG SEVEN, INC following a review of the company’s product labels, website, and social media, which found statements about the company’s BioMoringa, BioDiabetin, Maca Plus, BioProstate, Immune Support, HongoTrap, Honbacterol, ...

Recalls & Warnings

April 27, 2022

Prescription Drugs Found in Arthritis, Muscle Pain, and Osteoporosis Supplements

On April 20th, 2022, the FDA warned consumers not to use the following ”Artri“ or ”Ortiga” products promoted to treat arthritis, muscle pain, osteoporosis and bone cancer because they have been found to contain undeclared drugs that can have serious adverse ...

Recalls & Warnings

April 23, 2021

FDA Warns 5 Sellers of Unapproved COVID-19 Tests

Between March 18 and April 6, 2021, the FDA issued warning letters to five companies for selling unapproved, adulterated, and misbranded tests for coronavirus (COVID-19).

CL Answer

Which air purifiers are best for reducing microbial and smoke particles from room air?

Find out if portable air cleaners can remove the virus that causes COVID-19 infection from the air and learn which type air cleaners work best.

HEPA air purifier on bedroom floor

News Release

June 15, 2005

Two magnesium supplements fail testing due to lead contamination. Nineteen others pass. Report now available.

WHITE PLAINS, NY — JUNE 15, 2005 — ConsumerLab.com has released its latest report on the quality of magnesium supplements sold in the U.S. In addition to being an essential mineral, magnesium may help prevent migraine headaches, menstrual pain, PMS, and leg cramps during pregnancy.

Recalls & Warnings

June 08, 2021

FDA Warns Seller of "CoronaBox" Containing Vitamin D, Probiotics & More for Unsupported Claims

On May 24, 2021, the FDA issued a warning letter to Everything Health LLC following a review of the company's website by the FDA and Federal Trade Commission (FTC) which found the company promoted its CoronaBox (which contains cordyceps, vitamins, and K2, magnesium, ginger, probiotics ...

Recalls & Warnings

March 04, 2021

Federal Court Bars Confidence USA from Selling Supplements

On March 4, 2021, the FDA announced a permanent injunction has been entered, barring dietary supplement manufacturer Confidence USA Inc. and two of its executives from producing or selling products until they become compliant with current good manufacturing practices (cGMPs).

Recalls & Warnings

October 02, 2020

Tonic Therapeutic Herb Shop & Elixir Bar Warned for COVID-19 Claims

On September 29, 2020, the FDA issued a warning letter to Tonic Therapeutic Herb Shop & Elixir Bar for selling various herbal products, including Tonic Therapeutic Herb Shop & Elixir Bar, with unsupported claims that they can treat coronavirus (COVID-19).

News Release

July 16, 2002

ConsumerLab.com finds lead contamination remains a problem for certain mineral supplements — Lead found in iron, magnesium and, most recently, potassium pills

WHITE PLAINS, NY — July 16, 2002 — ConsumerLab.com announced today that its testing has shown that approximately 5% to 10 % of certain mineral supplements are contaminated with lead. The findings are based on ConsumerLab.

News Release

March 27, 2001

ConsumerLab.com expands testing of health products; success of dietary supplement evaluations leads company into broader nutrition field, beginning with popular nutrition bars

WHITE PLAINS, NY — March 27, 2001 — Having established its presence as the leading independent evaluator of the quality of dietary supplements sold in the U.S, ConsumerLab.com announced today the expansion of its work to include foods and food ingredients.

Recalls & Warnings

December 29, 2020

FDA Warns Five Sellers of CBD for Claims of Treating Arthritis, Alzheimer's and More

On December 22, 2020, the FDA issued warning letters to five sellers of CBD following reviews of the companies' websites, which found statements made about the companies' products to be drug claims.

News Release

February 14, 2001

Problems found with multivitamins and multiminerals by ConsumerLab.com

WHITE PLAINS, NY — February 14, 2001 — ConsumerLab.com announced today that only 14 of 27 products evaluated in its Multivitamin and Multimineral Product Review achieved full "CL Approved Quality" status.

Recalls & Warnings

April 14, 2020

Herbs of Kedem Warned for Making Coronavirus Claims

On April 10, 2020, the FDA issued a warning letter to Herbs of Kedem for selling products with unsupported claims that they can treat coronavirus (COVID-19).

Recalls & Warnings

January 04, 2020

Hormonal Balance Supplement Tied to Liver Failure

An otherwise healthy 23-year old woman in Texas is reported to have recently developed liver failure (requiring a liver transplant) after taking the supplement Balance (from Alani Nu) for four months.

Recalls & Warnings

December 10, 2002

Company Ordered to Cease Deceptive Marketing of Weight Loss Product

A U.S. District Court in Texas has ordered Mark Nutritionals, maker of Body Solutions Evening Weight Loss Formula, to stop making certain claims with regard to the product. The order is in response to a complaint by the Federal Trade Commission (FTC) accusing the company of false advertising.

Recalls & Warnings

September 10, 2012

Maker of Concussion Recovery Supplement Warned For Making Drug Claims

On August 28, 2012, the FDA issued a warning letter to Trinity Sports Group, Inc. after a review of the company's websites found statements about Neuro Impact Concussion Response Formula constituted drug claims not permitted on supplements. 

Recalls & Warnings

June 16, 2009

FDA Warns of Loss of Sense of Smell with Zicam Nasal Gel/Nasal Swab

On June 16, 2009, the U.S. FDA warned consumers and healthcare professionals to discontinue use of three Zicam Nasal Gel/Nasal Swab products sold over-the-counter as cold remedies because they are associated with the loss of sense of smell that may be long-lasting or permanent.

Recalls & Warnings

April 11, 2008

Twelve Dietary Herbal Supplements Recalled -- Possible Health Risk Associated with Ephedra, Aristolochic Acid and Human Placenta

On April 10, 2008, the FDA posted a recall notice issued the same day from Herbal Science International, Inc. (AKA Jen-On Herbal Science International, Inc.).

Recalls & Warnings

February 29, 2008

FTC Sues Sellers of Weight-Loss Pills for False Advertising

On February 8, 2008 the The Federal Trade Commission (FTC) charged a business operation with violating federal law by falsely claiming that its weight-loss pills cause users to lose weight without dieting or exercise.

Recalls & Warnings

March 13, 2006

FDA Warns About Steroid Products Sold as Dietary Supplements

On March 9, 2006, the U.S.

Recalls & Warnings

March 19, 2009

QVC Settles Charges of False Claims for Supplements

On March 19, 2009, the Federal Trade Commission (FTC) announced that QVC, Inc., a TV home shopping channel and one of the world’s largest multimedia retailers, has agreed to pay $7.

Recalls & Warnings

March 06, 2009

"The Truth About Nutrition" Marketers Agree to Pay $3 Million to Settle Charges of Deceptive Advertising of Dietary Supplements and Devices

On March 6, 2008, the Federal Trade Commission (FTC) announced that marketers of dietary supplements and health-related devices have agreed to pay $3 million in consumer redress to settle FTC charges that they deceptively claimed their products treated or prevented a wide variety of serious ...

Recalls & Warnings

November 17, 2009

Steroids Found in More Body Building Supplements

On November 17, 2009, the U.S.

Recalls & Warnings

January 18, 2013

Recall: Iron Supplement Containing Motion Sickness Drug

On January 18, 2012, Advance Pharmaceutical Inc. announced the recall of one lot of Rugby NATURAL IRON SUPPLEMENT Ferrous Sulfate Tablets 325 mg, because the bottles were found to contain meclizine HCl 25 mg tablets instead.

Recalls & Warnings

December 17, 2010

FDA Steps Up Efforts to Battle Tainted Supplements

On Dec. 15, 2010, the Food and Drug Administration (FDA) took new steps aimed at keeping consumers safe from harmful products that are marketed as dietary supplements and that contain undeclared or deceptively labeled ingredients.

Recalls & Warnings

December 14, 2010

FDA Warns Consumers to Avoid Man Up Now Capsules

On December 14, 2010, the U.S. FDA warned consumers not to use Man Up Now capsules, marketed as a dietary supplement for sexual enhancement, because they contain a variation of an active drug ingredient found in Viagra that can dangerously lower blood pressure.

Recalls & Warnings

November 21, 2010

FDA Warns Consumers Not to Use Vigor-25

On November 19, 2010, the U.S.

Recalls & Warnings

February 14, 2014

Weight Loss Supplement Containing Drug Recalled

On February 4, 2014, MyNicKnaxs, LLC. issued a recall of weight loss supplement Reduce Weight Fruta Planta because it was found to contain phenolphthalein.

Recalls & Warnings

February 10, 2018

Warning to D-Limonene, Vitamin C Seller

On January 31, 2018 the FDA issued a warning letter to Long Life Unlimited, LLC following a review of the company's website which found promotional statements and testimonials made about products including Balance 600, D-Limonene, Rapha Remedy, Rapha Remedy w/ p73 Wild Oregano, Vitamin C, ...

Recalls & Warnings

May 20, 2017

Muscle Enhancement Supplement Containing Steroid-Like Substances Recalled

On May 19, 2017, Dynamic Technical Formulations LLC issued a recall of all lots its muscle enhancement supplement Tri-Ton because it was found to contain anabolic steroid-like substances (andarine and ostarine) which are not permitted in dietary supplements.

Recalls & Warnings

May 08, 2017

Muscle Enhancement Supplement Recalled

On May 5, 2017, Genetic Edge Compounds issued a recall of all lots its muscle enhancement supplement GEC Laxoplex because FDA analysis found it to contain anabolic steroids and steroid like substances, which are not permitted in dietary supplements.

Recalls & Warnings

December 01, 2015

Multivitamins Recalled Due to Risk of Vitamin D Toxicity

On November 25, 2015, Glades Drugs, a compounding pharmacy in Pahokee, Florida, issued a recall of its compounded multivitamin capsules because they contain high amounts of vitamin D3 (exact amount was not reported).

Recalls & Warnings

October 17, 2015

23,000 ER Visits Linked to Supplements: Palpitations, Swallowing Problems, Allergies Common

Approximately 23,000 emergency room visits per year are attributed to adverse events linked to the use dietary supplements, according to a large, long-term study by the FDA and the Centers for Disease Control and Prevention (CDC).

Recalls & Warnings

April 14, 2015

Muscle Supplement Linked to Serious Liver Injury

On April 13, 2015, the FDA warned consumers not to use the muscle growth supplement Tri-Methyl Xtreme (distributed by Extreme Products Group) because it has been linked to serious liver injury.

Recalls & Warnings

March 10, 2015

Seller of Vision Supplements Warned for Manufacturing Violations, Drug Claims

On February 26, 2015, the FDA issued a warning letter to Biosyntrx, following a facility inspection which found the company's products, including BioTears Oral Gel Caps, ZoOmega-3 Concentrated Pharmaceutical-Grade Fish Oil, EpiCor A Nutrient-dense High Metabolite Immunogen, Sight C+ Mineral ...

Recalls & Warnings

February 06, 2015

Seller of Aloe Supplement Warned for Drug Claims

On January 21, 2015, the FDA issued a warning letter to Pristine Nutraceuticals, LLC, following a review of the company's website, http://www.digestaqure.com, which found statements made about DigestaCure to be drug claims.

Recalls & Warnings

December 05, 2014

Maker of Ginseng, Zinc, Calcium and More Warned for Manufacturing Violations

On November 20, 2014, the FDA issued a warning letter to Long Island Pharmaceuticals, LLC, following a facility inspection which found the company's products to be adulterated because they were prepared, packed, or held under conditions that violate Current Good Manufacturing Practices for dietary ...

Recalls & Warnings

August 08, 2014

FDA Warns Puerto Rico Supplement Seller

On June 30, 2014, the FDA issued a warning letter to Mr. Ramon Rosa, following a review of his website, www.aceitedeguanabana.

Recalls & Warnings

April 23, 2019

"Brain Boosting" Supplements Were Promoted With Non-Existent Clinical Studies

On April 10th, 2019, the FTC (Federal Trade Commission) announced the marketers of cognitive enhancement supplements Geniux, Xcel, EVO, and Ion-Z have agreed to settle charges that they made false claims about the product, including fake research references and celebrity ...

Recalls & Warnings

September 12, 2018

FDA Urges Consumers to Avoid Kratom

On September 11, 2018, FDA Commissioner Scott Gottlieb, M.D., urged consumers not to use products containing the kratom, an herb that is often promoted for pain relief and for relieving symptoms of opioid withdrawal.

Recalls & Warnings

February 13, 2018

American College of Sports Medicine Warns of Energy Drink Dangers

A new statement released by the American College of Sports Medicine (ACSM) highlights the dangers of energy drinks when consumed by children and adolescents, and calls for more studies on the safety and efficacy energy drinks.

Recalls & Warnings

December 06, 2013

Weight Loss Supplement Claims Challenged

On November 27, 2013, the National Advertising Division (NAD) recommended HealthyLife Sciences, LLC, modify or discontinue the use of certain claims made about the company's weight loss supplement Healthe Trim.

Recalls & Warnings

June 07, 2013

Seller of Red Rice Yeast With CoQ10, Respiratory Supplement And More Warned For Manufacturing Violations and Drug Claims

On February 25, 2013, the FDA issued a warning letter to Altasource, LLC, dba Meta Labs LLC, following a facility inspection which found the company's dietary supplements, including Respiratory Response, African Mango, Coffee Black Salve, Meta-Cell, Conjugated Linoleic Acid and Red Yeast Rice with ...

Recalls & Warnings

January 16, 2010

Recall of Body Building Supplements Containing Steroids

On January 15, 2010, the Food and Drug Administration (FDA) posted a voluntary recall notice from MuscleMaster.com, Inc. regarding all lots and expiration dates of seventeen dietary supplements sold in 2009 from June 1 and Novemember 17.

Recalls & Warnings

September 19, 2012

FDA Reports Arsenic in Rice Products -- Particularly Brown Rice

On September 19, 2012, the U.S. FDA released results of its testing of nearly 200 samples of rice and rice products, finding appreciable levels in many products, although the amounts in only a few exceed the cancer-warning threshold of the State of California (10 mcg per daily serving).

Recalls & Warnings

June 04, 2012

FDA Warning on Supplement for Pain Relief

On June 1, 2012, the U.S. FDA warned consumers that Reumofan Plus, marketed as a “natural” dietary supplement for pain relief and other serious conditions, contains several active pharmaceutical ingredients not listed on the label that could be harmful.

Recalls & Warnings

November 03, 2009

Recall of 65 Dietary Supplements That May Contain Steroids

On November 3, 2009, as part of its ongoing cooperation with the Food and Drug Administration ("FDA"), Bodybuilding.

Recalls & Warnings

February 15, 2006

New Zealand Warns of Liver Toxicity from Black Cohosh

On February 9, 2006, New Zealand's Therapeutic Goods Administration (TGA) announced new labelling and consumer information for medicines containing Black cohosh (Cimicifuga racemosa).

Recalls & Warnings

March 04, 2003

U.S. Warns of Ephedra Risks and Proposes Warning Label for Supplements

On February 28, the Department of Health and Human Services (HHS) announced a series of actions designed to protect Americans from potentially serious risks of dietary supplement products containing ephedra.

Recalls & Warnings

January 19, 2002

Recall of Certain Iron Supplements

The U.S. Food and Drug Administration (FDA) released the following Class III recall information in its January 16, 2002 Enforcement Report. A Class III recall is a situation in which use of or exposure to a violative product is not likely to cause adverse health consequences:

Recalls & Warnings

October 06, 2004

False Claims Made by Marketer of Cortisol-related Weight-Loss Supplements According to FTC

On October 6, 2004, the Federal Trade Commission (FTC)charged marketers of two dietary supplements with claiming, falsely and without substantiation, that their products can cause weight loss and reduce the risk of, or prevent, serious health conditions.

Recalls & Warnings

October 24, 2003

Court Closes the Doors on Company That Sold Weight Loss Supplement

On October 24, 2003, the Federal Trade Commission (FTC)announced that Mark Nutritionals, Inc. and Edward D’Alessandro, Jr. have agreed to settle federal charges that they used false and unsubstantiated claims to sell their weight-loss product.

Recalls & Warnings

September 17, 2003

FDA Warns of Illness from Star Anise Teas

On September 10, 2003, the Food and Drug Administration (FDA) advised consumers not to consume "teas" brewed from star anise.

Recalls & Warnings

August 25, 2002

Canadian Recall and Stop-Sale Order on All Kava Products

Health Canada is issuing a stop-sale order for all products containing the herb kava after a safety assessment concluded there is insufficient evidence to support their safe use. The department is also requesting the recall of these products from all levels of the market.

Recalls & Warnings

May 14, 2014

Maker of Mood, Smoking Cessation Supplements and More Warned for Violations, Drug Claims

On April 17, 2014, the FDA issued a warning letter to CDJ Holding, Incorporated, d.b.a.

Recalls & Warnings

June 09, 2005

FTC Cracks Down on "HGH" Supplements; $20 Million in Consumer Redress

On June 9, 2005, The Federal Trade Commission (FTC) announced that two Florida businesses have agreed to a federal court order requiring them to pay up to $20 million in consumer redress – the largest monetary judgment ever obtained in an FTC health fraud case – to settle charges that they ...

Recalls & Warnings

August 31, 2004

Two Makers of Weight Loss and Sex Enhancement Supplements Stopped From Making Unsubstantiated Claims

On August 27, 2004, the Federal Trade Commmission (FTC) reported that two Maine-based dietary supplement marketers and their principals have agreed to settle FTC charges that they made deceptive advertising claims about their dietary supplement products, in violation of federal law.

Recalls & Warnings

March 31, 2005

FDA Warns Marketer of "Vitamin O" Product to Cease Unsubstantiated Claims

The U.S. Food and Drug Adminstration (FDA) has sent a Warning Letter (dated February 8, 2005) to Donald L. Smyth, President, R-Garden Inc., and Rose Creek Health Products, Inc. warning that its "Vitamin O" product was, among other things, being marketed with unsubstantiated health claims.