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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.
Does heat kill coronavirus (COVID-19)? Can it disinfect face masks and packages?
Find out if heat kills the coronavirus SARS-CoV-2 that causes COVID-19 infection. Learn what temperature kills the coronavirus and more. ConsumerLab explains.
How to Avoid Buying Counterfeit Vitamins and Supplements
ConsumerLab explains how to spot and avoid counterfeit vitamins and supplements when shopping online, including what to look for on Amazon product pages, signs a supplement may be a counterfeit, and what to do if you think you've recieved a counterfeit product.
7 Red Flags to Watch Out For When Buying Vitamins & Supplements
When it comes to buying vitamins and supplements, it's buyer beware. ConsumerLab explains seven red flags to look out for on labels when choosing and buying vitamins or supplements, including claims of "FDA Approved" laboratories, what to look for in the ingredient list, and more.
I am curious why some probiotics do not require refrigeration even though they contain some of the same bacteria in probiotics that require refrigeration? Which probiotics need to be refrigerated?
Refrigerating certain probiotic pills and other probiotic supplements is important. Get tips on how to store probiotics properly.
Which supplements can cause diarrhea?
Can supplements like magnesium cause diarrhea? Find out which supplements may cause diarrhea, such as vitamin B12, curcumin, magnesium, vitamin C and fish oil.
What is the best sunscreen based on safety and efficacy?
Two different carcinogens, benzene and benzophenone have been found in popular sunscreens. These cancer-causing compounds are not listed on labels. Get the details and find out which sunscreens have been found to contain benzene and benzophenone.
Pros and Cons of Stevia and Other Sugar Substitutes
Learn about the pros and cons of sugar substitutes and artificial sweeteners summarized in our table within this article.
6 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 six practical tips to help avoid getting pills stuck in the throat.
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.
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.
Room Carbon Dioxide Monitors: A Good Way to Assess Room Ventilation and Reduce COVID Spread?
Learn about carbon dioxide monitors, including how they work, what to look for when buying a device, tips for using them, limitations, and which device is our Top Pick.
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.
How can I get tested for the coronavirus? Can I get an at-home test for COVID-19? Which are the best tests? Are any tests free?
Coronavirus (COVID-19) Tests: Where to get COVID-19 tests, including information about free testing, home testing and more. Information about SARS-CoV-2 virus tests, antibody tests and FDA approved tests.
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.
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.
B Vitamin Supplements Review (B Complexes, B6, B12, Biotin, Folate, Niacin, Riboflavin & More)
See Which B Vitamins Are ConsumerLab's Top Picks!
Bilberry Supplements Review
Choose the Best Bilberry Supplement. Some Bilberry Is Not Authentic!
How much calcium do you need each day, what forms are best, and how much is too much?
Learn about the recommended daily intake of calcium from food & supplements and why taking too much can be harmful. Also, learn about the forms of calcium that are available and which are best.
How are you staying healthy during the coronavirus pandemic?
Tips for staying healthy during the coronavirus (COVID-19) pandemic. Tips from ConsumerLab members for maintaining physical health, mental health and social well-being during COVID-19.
Vitamin D Supplements Review (Including Calcium, Magnesium, Boron, and Vitamin K)
Find the Best Vitamin D Supplement with the Right Dose
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.
Meal Replacement & Weight Management Powders and Shakes Review
Find the Best Meal Replacement and Weight Management Products. Only 64% of Meal Powders & Shakes Pass ConsumerLab.com's Tests of Quality.
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.
Have you tested vitamin K supplements with MenaQ7? Is this a good source of vitamin K if I need to avoid soy?
Information about MenaQ7, a MK-7 form of vitamin K2, including test results for a supplement containing MenaQ7.
I developed a rash soon after starting a probiotic. Is it possible to be allergic to probiotics?
Find out if probiotics can cause allergic reactions, including skin rashes, and why.
How do the COVID-19 vaccines compare in terms of efficacy, safety and side effects? How, when and where do I get the COVID-19 vaccine?
Find out how the COVID-19 vaccines from Pfizer and Moderna compare and learn how when and where you can get the COVID-19 vaccine.
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.
How does turmeric spice compare to curcumin (turmeric extract) in supplements? I sprinkle it on my foods and wonder if that's equivalent to taking a supplement.
What is the difference between turmeric spices used in the kitchen and turmeric supplements? Is sprinkling turmeric on my food equivalent to taking a turmeric supplement? ConsumerLab's answer explores this question.
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.
Vitamin C Supplements Review
Find the Best Vitamin C Supplement. Tests and Reviews of Popular Vitamin C Supplements & CL's Top Picks.
Calcium and Bone Health Supplements Review (Including Vitamins D & K, Magnesium and Boron)
See Which Bone Health Supplements Are Top Picks and Which Fail
Prostate Supplements Review (Saw Palmetto and Beta-Sitosterol)
Find the Best Prostate Supplement for Symptoms of BPH. See Which Prostate Supplement Passed or Failed CL's Tests of Quality.
When choosing a vitamin C supplement, should you look for one that is "reduced," "L" form (l-ascorbic acid), or "natural"?
Are supplements containing "natural" vitamin C, "reduced" vitamin C, or l-ascorbic acid better than regular vitamin c or ascorbic acid supplements? Find out if these forms are better absorbed or have other advantages, plus, learn about buffered and slow-release forms of vitamin C.
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.
Are lozenges and sublingual pills considered dietary supplements?
Learn more about lozenges and sublingual pills (such as echinacea, zinc and B12) including safety warnings.
Is it safe to take melatonin when taking prescription sedatives or sleep aids like lorazepam (Ativan) or zolpidem (Ambien)?
Safety information on taking melatonin while using prescription sedatives or sleep aids like lorazepam (Ativan) or zolpidem (Ambien).
How can I tell if my fish oil supplement is rancid (oxidized) or spoiled? And if it is spoiled, is it still safe to take?
Find out how to tell if your fish oil supplement is rancid (oxidized) or spoiled and how to store fish supplements to keep them fresh. ConsumerLab.com's answer explains.
Should olive oil be refrigerated?
Learn if you should store olive oil in the refrigerator to keep it fresher longer.
Water Filter Pitchers Review
See the Best Pitchers For Different Filtering Needs
What is the best protein supplement for vegetarians and vegans?
Find out which protein supplements for vegetarians and vegans are best, including those made from whey, casein, soy, rice, pea, and hemp. ConsumerLab.com's answer explains.
Which air purifiers are best for reducing the spread of COVID-19?
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.
I heard the S-form of alpha-lipoic acid is bad for me. Why is it in my supplement?
Learn more about R-form alpha-lipoic acid and S-form alpha-lipoic acid and their activity, as described by experts at ConsumerLab.com.
Are there supplements that can reduce prostate size?
How to reduce prostate size using supplements for benign prostatic hyperplasia (BPH), including beta-sitosterol and saw palmetto.
If I buy NAC as a loose powder in a large bag, as opposed to in tablet 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.
Kelp Supplements Review
Choose the Best Kelp Supplement. Be Cautious With Kelp! Only 50% of Supplements Pass CL's Review.
Fish Oil, Krill Oil, and Algal Oil Omega-3 (DHA & EPA) Supplements Review
Find the Best Fish Oil & Compare to Prescription Omega-3 Drugs. See Our Top Picks Among Fish Oil & Other Omega-3 Supplements for Adults, Children and Pets.
Which vitamins and supplements should be stopped before getting blood work and laboratory tests?
Find out which vitamins and supplements can interfere with blood, urine or stool tests, and imaginging tests. Learn how B vitamins such as biotin, niacin and riboflavin, as well as calcium supplements, St. John’s wort, vitamin C, and others supplements can affect test results, as well as common foods that may interfere with tests.
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.
What is vitamin B12 and how much do I need?
Vitamin B12 dosage varies depending on your age, gender, and various other factors. Our CL Answer explains why B12 is important, the recommended dosages, deficiency, health benefits, and the best form.
What are CoQ10 side effects?
CoQ10 side effects, such as nausea, headache, and insomnia, and how you can reduce the occurrence of CoQ10 side effects. ConsumerLab.com's answer explains.
Are there side effects from collagen supplements?
Find out if there are collagen side effects from supplements (collagen hydrolysate, collagen peptides, etc.) such as nausea, constipation, skin rash and others. ConsumerLab.com's answer explains.
What are the health benefits of dark chocolate?
Information on the health benefits of dark chocolate, including how dark chocolate may improve heart health, decrease blood sugar levels and more. ConsumerLab.com's answer explains.
Why aren't there children's multivitamins specifically for girls vs. boys?
Find out the best children's multivitamins for girls and boys, why there aren't different multivitamins for girls and boys, why teen girls and boys have different nutritional needs, especially when it comes to iron, and the best multivitamins for children, teen boys and girls, adults, adults over 50, prenatal vitamins and vitamins for pets.
Is it okay to crush or break vitamin pills to lower the dose or mix into food?
Learn about the safety of crushing vitamin pills, tablets, capsules or enteric-coated tablets and ingesting the powder with food, as opposed to taking a whole pill.
Have any supplements been shown to increase women's libido?
Learn more about supplements that may increase women's libido, including DHEA and maca.
There are many reports of lead contamination in turmeric spice. How can I make sure I'm not getting lead in my turmeric supplement or spice?
Find out how to avoid contaminated curcumin and turmeric supplements and spices, and see our Top Picks in our Curcumin/Turmeric Product Review.
Help! How do I know how much magnesium I am actually getting from my supplement? The label says it contains 500 mg of magnesium "as magnesium citrate" -- but how much of that is magnesium and how much is citrate?
Understand the actual amount of magnesium dosage (or "elemental magnesium") you are getting from your supplement. ConsumerLab.com explains.
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.
I find labels on supplement bottles misleading. For example, an L-theanine label says 200 mg on the front but the back says each pill contains just 100 mg, but a serving is 2 capsules. Is this legal?
Learn more about misleading supplement labels and legality, including labels that say "formulation," "blend," or "complex."
Can biotin supplements really strengthen nails or improve hair? Can other supplements help?
Learn more about strengthening brittle nails with vitamin B-7 (biotin), based on clinical evidence.
Is hyaluronic acid helpful for osteoarthritis?
Hyaluronic acid supplement information including joint pain, osteoarthritis, clinical evidence, dosage and more.
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.
I recently read that turmeric is only effective if it is combined with black pepper. Is this true?
Find out the best way to take turmeric and curcumin supplements to increase absorption and bioavailability. ConsumerLab.com's answer explains.
Olive Leaf Extract Supplements Review
Learn What Olive Leaf Does and the Best Brands
Menopause Supplements Review (Soy and Red Clover Isoflavones, Black Cohosh) and Progesterone Creams
Choose the Best Menopause Supplement. Find Out Now Which Soy Isoflavone, Red Clover, Black Cohosh, and Progesterone Products Have the Active Compounds You Want!
Plant-Based Milks Review (Almond, Cashew, Coconut, Flax, Hemp, Macadamia, Oat, Pea, and Soy)
Find the Best Non-Dairy Milk Alternative. ConsumerLab Tests Reveal What's Really In Plant-Based Milks.
Protein Powders, Shakes, and Meal Replacements Review
Find Out Which Protein Products Passed or Failed Our Tests
What is the best way to take melatonin to get a good night's sleep?
Learn more about the best way to take melatonin for better sleep. When to take it, how to take it, and general melatonin information.
Do any supplements help prevent or treat a cold?
Are there supplements that can help prevent or treat cold symptoms? Learn more about zinc, probiotics, vitamin C and more.
How do I find the best quality olive oil and what are the health benefits?
Health Benefits of olive oil, including heart benefits, anti-inflammatory effects. Plus, how to choose a quality olive oil and cook with olive oil
Calcium May Extend Life or Shorten It, Depending on Amount
The right amount of calcium from supplements may reduce the risk of dying over a period of time for some people, says a new study. But too much calcium does not help. In fact, too much may hurt. Be sure you're getting the right amount of calcium. Get the details (and our tests of calcium supplements) in the updated Calcium Supplements Review >>. (For a quick summary about calcium dosage, be sure to read the section "What You Need to Know About Calcium Supplements.")
Joint Health Supplements Review (Glucosamine, Chondroitin, MSM, Boswellia, Collagen and Turmeric)
One-Third of Joint Health Supplements Failed to Pass Our Tests. See Which Passed or Failed, and our Top Picks.
Do Sugar Bear Hair Vitamins make hair shine, nails stronger, and help both to grow? They taste good but are super expensive.
Info on Sugar Bear Hair vitamins. Do they make hair shine, nails stronger and help hair and nails grow? ConsumerLab.com's answer explains.
Can I trust lab reports and Certificates of Analysis provided by supplement manufacturers?
Lab reports and Certificates of Analysis are provided by supplement manufacturers, but sometimes include incorrect testing and "dry labbing". ConsumerLab.com's answer explains.
Are the "% DV" numbers on vitamin supplement labels really based on what I need?
Learn more about percent daily values, including if they are good standards of measure or if better upper and lower limits exist.
Do any supplements improve balance or reduce the risk of falls?
Find out which vitamins & supplements may improve your balance to help reduce the risk of falling, including vitamin D and protein.
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.
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.
Is it better to use a powdered product that you mix with liquid than to take a pill? I was told that the vitamins will be more completely absorbed. Is that true?
Learn more about taking supplements & multivitamins in powder or tablet form, including tips on how to get the most from your supplement.
How do I choose the best magnesium supplement?
Choosing the best form of magnesium supplements can be tricky due to the many different types (magnesium aspartate, bicarbonate, carbonate, chloride, citrate and others).
What face shield is best to protect from COVID-19 and when should I wear one?
Review of face shields and information about face shields to help protect against coronavirus (COVID-19). If properly made and worn, face shields provide extra protection for close interactions with individual who may be infected.
Are there supplements I should take, or take differently, when intermittent fasting?
Supplements that may help when intermittent fasting. Information about whey protein, CoQ10, magnesium and others, plus coffee, fiber and more.
Huperzine A Supplements Review
Choose the Best Huperzine A Supplement. CL Tests Reveal the Best Huperzine A Supplements for Memory.
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.
Do water filters remove microplastics from tap water?
Find out if water filter pitchers and faucet mounted filters from Brita, Pur, Lifestraw and other brands remove microplastics from tap water.
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.
A blood test showed my vitamin D level is low. How do I know how much vitamin D to take?
Find out how to increase vitamin D blood levels, including a good target range.
Which "whole food" multivitamins don't include synthetic vitamins? How about Complete Foods, Sunwarrior, Garden of Life, Nature's Brands, and Doctors' Research?
Find out which "whole food" multivitamins are only from foods and which include synthetic vitamins, including Complete Foods Nutrition-OctoMega MultiVitamin; Sunwarrior; Garden of Life-MyKind Organics; Nature's Brands-PhytoVitamins; Doctors' Research MultiVitamin.
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.
Magnesium Supplements Review (Including Calcium, Boron, and Vitamins D & K)
Find Out What Magnesium Does, Who Needs It, and Our Top Picks Among Supplements
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.
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.
Is it better to eat farmed salmon or wild salmon? Which one has more omega-3s and less contamination with PCBs, mercury, etc.?
Learn more about wild caught vs. farm raised salmon, including omega-3 content and contamination with PCBs, mercury, and other toxins.
Which supplements are important after bariatric surgery (i.e., weight loss or stomach-reducing surgery)? Are there any I should avoid?
Find out which supplements may help after weight loss or stomach reducing surgery, including iron and calcium, and which should be avoided.
Garcinia Cambogia (HCA) Supplements Review
Find the Best Garcinia Cambogia Supplement. Choose Carefully! Most Garcinia (HCA) Weight Loss Supplements Lack Listed Amount of Ingredient .
Alpha Lipoic Acid Supplements Review
Choose the Best Alpha-Lipoic Acid Supplement. Some Alpha-Lipoic Acid Supplements Cost 13 Times As Much As Others -- But Is It Worth Paying More?
Can raspberry ketone help me lose weight?
Information on raspberry ketone and whether there is evidence it can help with weight loss.
I take omeprazole (Prilosec), a proton pump inhibitor, to reduce stomach acid. Are there supplements I should avoid, or be taking, due to this drug?
Supplement interactions with proton pump inhibitor (PPI) drugs like omeprazole (Prilosec) and Nexium.
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.
Which supplements can help to lower blood pressure?
Supplements to lower blood pressure, including CoQ10, vitamin C, fish oil, and olive oil, are all explored to find out what works.
I've read that the best form of vitamin E is d-alpha tocopheryl succinate (it's recommended in the paleo diet, for example), but I don't see that listed on product labels. How can I find it?
Learn more about the different names and types of vitamin E, including d-alpha tocopheryl succinate, natural and synthetic.
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.
Iron Supplements Review (Iron Pills, Liquids and Chews)
See Which Iron Supplements Are CL's Top Picks for Different Needs
Joint Health Supplements for Pets Review (Glucosamine, Chondroitin, MSM & Boswellia)
See Which Pet Supplements for Joint Health Passed Our Tests and Which Didn't!
Multivitamin and Multimineral Supplements Review
Best Multivitamins In 2023 -- Caution with Gummies
Potassium Supplements Review
Be Careful with Potassium Supplements! Problems Found. Tests and Reviews of Potassium Supplements & CL's Top Picks.
Cranberry Juices and Supplements Review
CL's Tests Show Which Cranberry Juices and Supplements Are Best and Cost the Least
L-Arginine Supplements Review
Choose the Best L-Arginine Supplement. Find Out Which L-Arginine Supplement Passed CL's Tests.
Reishi Mushroom Supplements Review
Find the Best Reishi Mushroom Supplement. See How Reishi Supplements Differ.
Nutrition Bars & Cookies Review (For Energy, Fiber, Protein, Meal Replacement, and Whole Foods)
Find the Best Nutrition Bar or Cookie. ConsumerLab Tests Reveals Not All Nutrition Bars and Cookies Contain What They Claim.
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.
What are the best supplements or lifestyle modifications for sleep, and which can make insomnia worse?
Find out which vitamins may help you sleep and learn if any vitamins or supplements can cause insomnia.
How do over-the-counter (OTC) hearing aids compare to prescription hearing aids?
Non-prescription hearing aid reviews, including MD Hearing Aid, Eargo Hearing Aid, Liberty Hearing Aid, etc. Compare quality & cost with prescription hearing aids.
Can taking too much vitamin B-12 be dangerous? The label on my B-complex states it contains 50,000% of the Daily Value!
Find out the daily value for vitamin B-12 and the potential side effects of taking too much B-12. ConsumerLab explains why taking too much vitamin B-12 can be harmful.
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 cranberry juice or cranberry supplements help prevent urinary tract infections or improve overactive bladder?
Learn more about how cranberries, juice, and supplements can help prevent urinary tract infections, including safety.
Herbal Laxatives – Tell Your Doctor
If you’ve been regularly using herbal laxatives, be sure that your doctor knows prior to a colonoscopy or abdominal surgery. Find out why in our article about supplements and surgery.
Low Vitamin D Levels and Obesity -- A Dangerous Combination
A new study links low blood levels of vitamin D in obese individuals to a greatly increased risk of insulin resistance (a condition linked to type 2 diabetes). The results add to the growing list of reasons to make sure you maintain a sufficient level of vitamin D. Get the details in the latest update to ConsumerLab.com's Vitamin D Supplements Review. More >>
Up To a Point, Alzheimer's Risk Falls with Vitamin D
A new study shows that, up to a point, the risks of developing Alzheimer's disease and other forms of dementia fall with higher blood levels of vitamin D. However, the research also clarifies that exceeding a certain blood level of vitamin D provides no further benefit. In fact, additional research suggests that too much vitamin D can have negative effects. The message: Make sure you have a sufficient, but not excessive level of vitamin D. For details about these levels, as well as results of our tests of vitamin D supplements, see the updated Vitamin D Supplements Review >>
Hair & Nail Supplements Can Skew Lab Tests
There are reports of high-dose biotin (common in "hair and nail" supplements) causing false readings on blood tests. Be sure to tell your doctor if you're taking high-dose biotin. Get the details in the Biotin section of the B Vitamin Supplements Review.
Dog Overdoses on Supplement
Be sure to keep your supplements away from pets -- especially if they taste sweet. A dog overdosed on its owner's fast-dissolving tablets, putting it in a coma, according to a recent report. For details, see the Concerns and Cautions section of the L-tryptophan and 5-HTP Supplements Review.
Vitamin D & Muscle
If you are looking to increase muscle mass, make sure you're getting adequate vitamin D. Raising deficient levels has been shown to increase muscle in seniors, and more recently, in men and women in their 40s. For details see the Muscle, balance and falls section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.
Lower Cancer Risk With High Vitamin D?
A recent analysis suggests that breast cancer risk is lowest with vitamin D blood levels at or above 60 ng/mL -- an unusually high level. Before you try this at home, be sure to read our commentary in the What It Does section of the Vitamin D Supplements Review. (Also see our Top Picks for vitamin D.)
Plant-Based Milk Caution
There may be negative effects for bones when switching to certain types of plant-based milks, according to a recent study. See the details in the Concerns and Cautions section of our Plant-Based Milks Review. Be sure to see our Top Picks among plant-based milks.
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.
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.
What is fermented cod liver oil, such as Blue Ice? Is it better than regular cod liver oil?
Fermented cod liver oil information including if Rosita & Blue Ice (Green Pastures) is as good a source of vitamins and DHA as regular.
Why does my multivitamin make me nauseous? Is there anything that can help?
Find out if ingredients in multivitamins can cause nausea and gastrointestinal discomfort.
Is drinking coffee good or bad for heart health?
Learn more about coffee and caffeine, its safety, if it's good for you, how much coffee is too much and its impact on your heart.
Tablets I purchased are becoming "crumbly" after a few weeks and are easy to break. Is there a problem with this supplement?
Should you be concerned if your supplement tablets have started to crumble? Learn more including the best way to keep pills from getting soft.
I'm worried that I'm not getting enough potassium, but potassium supplements only provide a small dose -- much less than the daily requirement. Why is this, and how can increase my daily intake?
Find out why many potassium supplements contain small doses of potassium and how to get adequate potassium from food and supplements.
Can psyllium help control hunger and appetite?
Learn more about psyllium (found in Metamucil), including effects on appetite and hunger control, results from clinical studies and safety.
Do UV light sanitizing wands and boxes kill coronavirus (COVID-19)?
UV light is promoted as an effective and convenient alternative to chemical disinfectants, but can it work against the coronavirus? Learn the the pros and cons and see our reviews and comparisons of popular UV devices on the market.
Is Ester-C the best form of vitamin C?
Info on Ester-C Vitamin C, including which form of vitamin C is best, fully-reduced, liposomal and others based on absorption and side effects. ConsumerLab.com's answer explains.
Which ingredients should toothpastes and other dental products contain, and which should be avoided?
Learn about ingredients you want in your toothpaste, mouthwash and other dental products and which ingredients you may want to avoid.
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.
Which supplements help with Raynaud's phenomenon?
Raynaud's phenomenon may be helped by some supplements. Learn more about fish oil, Gingko biloba, and ginseng.
Will sprinkling black pepper on food with turmeric help increase the bioavailability of curcumin in the turmeric?
Find out how black pepper extract (piperine, Bioperine) in supplements compares with regular black pepper added to foods with turmeric. Plus, safety, side effects and drug interactions with black pepper extract.
I'm taking Lumiday, a supplement to improve mood. It seems to help me but is it safe?
Lumiday info including side effects, drug interactions and reviews. Lumiday is a supplement marketed to improve mood.
Can heat and humidity destroy whey protein and other sports nutrition supplements (e.g., creatine, BCAAs, digestive enzymes) during shipping or while storing at home?
Find out if heat and humidity can degrade creatine, BCAAs, digestive enzymes, and other muscle enhancing supplements.
Will pregnenolone help slow down aging or reduce chronic pain?
Learn more about the steroid hormone pregnenolone, including its effects in the body and on aging and chronic pain.
If I already take red yeast rice, would adding high-dose niacin help further reduce my cholesterol levels, and would this be safe?
Learn more about the effect of combining red yeast, statins and high-dose niacin on cholesterol and safety.
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.
Vitamin D and Inflammation
A new study found that raising low levels of vitamin D appears to reduce inflammation in the body (based on measurements of C-reactive protein, or CRP, a marker of inflammation). However, once vitamin D levels reached what some people consider to be barely sufficient, CRP slowly but progressively increased, suggesting an inflammatory action of vitamin D at higher levels. The study raises the question of what is the ideal level of vitamin D in the body.
Be sure you have the latest information! See the update to the Vitamin D Supplements Review, which includes details on this and other vitamin D studies, as well as our latest product tests.
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?
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 ...
60% of St. John's Wort Supplements Fail ConsumerLab.com Tests of Quality
White Plains, New York, September 26, 2016 — St. John's wort extracts can be as effective as standard antidepressant drugs for treating mild to moderate major depression, with significantly fewer side effects. However, recent ConsumerLab.com tests revealed that six of ten St.
Rhodiola: Does It Help With Depression and Anxiety and Which Brands Are Best? -- ConsumerLab.com Reviews the Evidence and Tests the Quality of Popular R. Rosea Supplements --
White Plains, New York, March 22, 2016 — Rhodiola (R. rosea) supplements are promoted to treat depression, anxiety, and fatigue — but do they really work? And do products on the market contain the right species, amounts, and appropriate doses of R.
ConsumerLab.com Shows How to Choose the Right Melatonin Supplement for Sleep
White Plains, New York, May 28, 2015 — An estimated 60 million Americans experience insomnia each year, according to the National Institutes of Health, and they increasingly turn to the supplement melatonin for potential help. In fact, U.S. sales of melatonin increased 16.
ConsumerLab.com's Tests of Digestive Enzyme Supplements Reveal What Labels Don't
White Plains, New York, May 5, 2015 — How do you know if your digestive enzyme supplement is truly active? The only way to know for sure is to test it on fats, carbohydrates, proteins and other parts of food which it is expected to digest. That's exactly what ConsumerLab.
ConsumerLab.com Finds Popular Cocoa Powders Contaminated; High Concentrations of Cadmium Raise Concern
White Plains, New York, August 5, 2014 — Following up on its discovery in May of high levels of the toxic metal cadmium in several cocoa-based products, ConsumerLab.com recently tested additional, popular cocoa products sold in the U.S. to assess the extent of the problem.
Best Fish Oil? ConsumerLab.com Testing Finds Many High Quality Supplements, But Pitfalls Exist
White Plains, New York, August 10, 2014 — Recent laboratory tests of fish oil, krill oil, algal oil, calamari oil, and green-lipped mussel oil supplements by ConsumerLab.com revealed quality problems with four out of 30 supplements selected for review.
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).
What's Really in Turmeric Supplements and Spices? You May Not Want to Know -- 33% of Turmeric/Curcumin Supplements Fail ConsumerLab.com's Review; Filth Found in Spices
White Plains, New York, December 16, 2013 — Supplements containing the herb turmeric or its key constituent, curcumin, are popular treatments for inflammatory diseases. ConsumerLab.
Many Probiotic Supplements Fall Short on Listed Amounts of Helpful Organisms
White Plains, New York, November 25, 2013 — Probiotic supplements and foods containing "friendly" bacteria or yeast have become popular among people hoping to improve bowel function, immunity, and even mood.
ConsumerLab.com Reports Problems and “Top Picks” Among Bars for Energy, Fiber, Protein, Meal-Replacement, and Whole Food
WHITE PLAINS, NEW YORK — October 8, 2013 — Which nutrition bars provide the best combination of nutrition and taste, and are accurately labeled? ConsumerLab.com recently set out to answer this question by purchasing popular bars in the U.S.
Labels on Potassium Supplements May Confuse, But Product Quality is High According to ConsumerLab.com
White Plains, New York August 21, 2013 — How much potassium would you expect from a supplement called "Potassium Gluconate 595 mg"? The correct answer is just 99 mg, as ConsumerLab.com explains in its new Potassium Supplements Review, published online today.
Green Teas Vary in Strength and Amount of Lead Contamination, According to ConsumerLab.com
White Plains, New York, May 21, 2013 — If you drink green tea for your health, be aware that the catechin and caffeine levels can vary by more than 240% across products. Some also contain significant amounts of lead in their tea leaves. This is according to recent tests by ConsumerLab.
ConsumerLab.com Reports Problems with Some Vitamin D and Calcium Supplements -- Wrong Amounts of Vitamin D, Pills Which Don’t Break Apart, and Lead Contamination Found
White Plains, New York, February 11, 2012 — Vitamin D and calcium are among the most popular supplement ingredients in the U.S., but recent tests by ConsumerLab.com show problems with 4 out of 25 products which contain these ingredients.
ConsumerLab.com puts multivitamins to the test
June 16, 2011, New York, NY — Laboratory test results of 60 multivitamins have shown that you can't always judge a supplement by its label—or by its price. "Consumers should know that multivitamins vary widely in quality, "says Tod Cooperman, M.D., President of ConsumerLab.com.
Recalls & Warnings
Seller of Immune Shot Criminally Charged With Making Coronavirus Claims
On August 10, 2020, prosecutors in Georgia charged Matthew Ryncarz and his company Fusion Health and Vitality, LLC d/b/a/ Pharm Origins with selling the misbranded product Immune Shot.
ConsumerLab.com finds 100-fold variation in cost of iron supplements
WHITE PLAINS, NEW YORK — MARCH 28, 2011 — ConsumerLab.com announced today that the cost to get an equivalent dose of iron from supplements varies by more than 100-fold. A 25 mg dose of iron can cost as little as two cents or over two dollars, depending on the product.
Some turmeric and curcumin supplements fail quality review -- ConsumerLab.com finds 20% of turmeric supplements selected for review deliver less than 15% of promised compounds
WHITE PLAINS, NEW YORK — FEBRUARY 16, 2011 — Supplements containing the herb turmeric or its key compound, curcumin, have become popular in the U.S. ConsumerLab.com cautioned today that two out of ten turmeric products recently selected for quality testing were found to provide only 7.
ConsumerLab.com finds quality of most CLA supplements for slimming to be high; One brand mislabeled -- Report is first published in series on supplements for weight loss and slimming
ConsumerLab.com Finds Quality of Most CLA Supplements for Slimming to be High; One Brand Mislabeled
ConsumerLab.com finds improvements in labeling of nutrition bars but potential pitfalls exist -- New report compares 20 bars, including those for protein, fiber, energy and whole food
WHITE PLAINS, NY — August 12, 2008 — Labeling on nutrition bars has become more accurate, according to a new report by ConsumerLab.com.
ConsumerLab.com tests cancer-prevention supplements; several contaminated with lead or low in ingredient — Report available for green tea, selenium, and lycopene supplements
WESTCHESTER COUNTY, NEW YORK — APRIL 26, 2006 ConsumerLab.com announced results today from its new Product Review of Supplements for Cancer Prevention covering 22 products. Cancer is the second leading cause of death in the U.S.
ConsumerLab.com reports on nutrition bars — Highlights major differences, inaccuracies, and urges consumers to "know your bar"
WHITE PLAINS, NY — February 8, 2005 — ConsumerLab.com reported test results today for 34 nutrition bars, including those designed for high protein, low-carb/diet, energy, or meal-replacement.
New ConsumerLab.com report on St. John's wort highlights benefits and risks of herbal product for depression
NEW CONSUMERLAB.COM REPORT ON ST.
ConsumerLab.com finds many cholesterol-lowering supplements poorly made — Test results published online today
WHITE PLAINS, NY — July 31, 2003 — ConsumerLab.com reported today that more than half of the cholesterol-lowering supplements that it recently purchased failed to contain their listed ingredients and/or could not adequately break apart to release their contents.
Enormous variation found in strength of garlic supplements — most popular herb in U.S. — ConsumerLab.com releases results online today
WHITE PLAINS, NY — October 29, 2002 — ConsumerLab.com's Product Review of Garlic Supplements found strength to vary by as much as 1500% across products. Strength was based on each product's ability to generate allicin, a chemical associated with the efficacy of non-aged garlic.
ConsumerLab.com finds nutrition powders & drinks more accurately labeled than nutrition bars, but unapproved food ingredient seen in some
White Plains, NY -- March 5, 2002 — ConsumerLab.com announced today that 24 of 26 nutrition powders and drinks that it recently evaluated met their label claims for carbohydrates, fats, and proteins. This is in stark contrast to ConsumerLab.
Problems and ambiguity among alternative estrogen products reported by ConsumerLab.com — Results of soy and red clover isoflavone product testing released online today
WHITE PLAINS, NY — August 15, 2001 — ConsumerLab.com, an independent evaluator of dietary supplements and nutrition products, today released results of its Phytoestrogen Product Review. The review focused on dietary supplements made from soy and red clover isoflavones.
Recalls & Warnings
Xylitol in Supplements Poses Danger for Dogs
On May 12, 2016, the FDA warned consumers that xylitol, a popular sweetener found in chewable vitamins, chewing gum, breath mints, toothpaste and a variety of other products, is toxic to dogs.
Recalls & Warnings
Seller of Weight and Enhancement Supplements Warned For Drug Claims
On December 11, 2015, the FDA issued a warning letter to The One Minute Miracle, Inc., following a review of the company's website which found statements made about Miracle Diet 30 and Miracle Rock 48 to be drug claims.
Recalls & Warnings
"Thermo Stimulating" Supplement Recalled -- Contained DMAA
On January 23, 2013, Health Canada advised consumers not to use certain batches of Muscletech Hydroxystim capsules which were found to contain DMAA (1,3-dimethylamylamine) and have been recalled by their distributor.
Recalls & Warnings
FTC Warns of Deceptive Claims with Children's Omega-3 Supplements
On February 17, 2010, the Federal Trade Commission (FTC) announced that it had sent letters to 11 companies that promote various omega-3 fatty acid supplements, telling them they should review their product packaging and labeling to make sure they do not violate federal law by making baseless ...
Recalls & Warnings
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
Non-Decolorized Aloe, Goldenseal Root Added to Prop 65 List of Cancer-Causing Chemicals
On December 4, 2015, California's Office of Environmental Health Hazard Assessment (OEHHA) added non-decolorized whole leaf extract of aloe vera and goldenseal root powder to the state's list of chemicals known to cause cancer - part of the Safe Drinking Water and Toxic Enforcement ...
Recalls & Warnings
Illegal Claims on Weight Loss, Immune System Dietary Supplements, and Few Backed by Clinical Data
On October 3, 2012, the U.S. Department of Health and Human Services issued a report warning that dozens of weight loss and immune system supplements have illegal claims of curing or treating disease on their labels and/or lack the scientific evidence to support such label claims.
Recalls & Warnings
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
Canada Requests Recall of Certain Ephedra/Ephedrine Products
OTTAWA - January 10, 2002 - Health Canada is requesting a recall from the market of certain products containing Ephedra/ephedrine after a risk assessment concluded that these products pose a serious risk to health.