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Evening Primrose & Flaxseed (ALA/GLA)

Flaxseed Oil, Evening Primrose Oil, Borage Oil, Hemp Oil and Black Currant Oil Supplements Reviewed by ConsumerLab.com

Find the best flaxseed oil, evening primrose oil, borage oil, hemp oil, and black currant oil supplements (sources of omega-3 and omega-6 fatty acids), evidence for use for lowering cholesterol, triglycerides and blood pressure, potential skin benefits and more. Find out which ones passed our tests and why.

Evening Primrose & Flaxseed (ALA/GLA) Review

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CL Answer

I'm a vegan but my doctor wants me to take fish oil with EPA and DHA. Is there something I can take that would be as good as fish oil capsules but would satisfy the needs of a vegan?

Find out which vegan-friendly fatty acid supplements contain EPA and DHA and how they compare to fish oil.

Vegan Friendly EPA and DHA Supplements -- Fish Oil Pills

News Release

April 03, 2020

Tests of Holy Basil Supplements Show 63% Fail on Quality -- ConsumerLab Tests Reveal the Best and Worst Holy Basil Supplements

White Plains, New York, April 3, 2020 — Holy basil supplements are promoted to reduce stress and anxiety, lower blood sugar, and strengthen the immune system.

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

November 19, 2018

Tests Reveal Best Fish Oil Supplements and How They Compare to Prescription Fish Oil

White Plains, New York, November 19, 2018 — Fish and marine oil supplements containing the omega-3 fatty acids EPA and DHA offer a range of potential benefits for improving mental health, reducing inflammation, and even cancer prevention.

News Release

November 27, 2017

Flaxseed and Other Popular Omega 3 & 6 Oil Supplements Tested, But Not All Brands Pass -- Tests of Black Currant Oil, Borage Oil, Evening Primrose Oil, Flaxseed Oil, and Hemp Oil Supplements

White Plains, New York, November 27, 2017 — Flaxseed oil and other popular seed oil are popular supplements that provide omega-3 and omega-6 fatty acids and may help with inflammatory conditions. But which seed oil supplements are the best? To find out, ConsumerLab.

CL Answer

Do any supplements help reduce menstrual pain or symptoms of premenstrual syndrome (PMS)?

Find out which supplements help reduce premenstrual syndrome (PMS) symptoms, such as mood swings, pain, bloating, irritability and food cravings.

Woman in PJs Holding Stomach from Abdominal Pain

CL Answer

Is it better to take fish oil, flaxseed oil -- or both?

Fish oil and flaxseed oil -- how they are different, what they are used for, if and how they can help with arthritis, depression, lowering cholesterol & more.

Flaxseed Oil vs Fish Oil -- Omega-3 Supplements

CL Answer

My dog is getting older and his veterinarian recently recommended giving him a glucosamine supplement for his joints. Has ConsumerLab.com tested these, or other supplements for pets?

Find out our test results on glucosamine for dogs and cats as well as other supplements for pets.

Joint Health Supplements for Pets

Clinical Update

8/22/2014

Flaxseed Lowers Blood Pressure

Consuming milled flaxseed significantly lowered blood pressure in people with peripheral arterial disease, according to a recent clinical trial. Additional analysis of those results suggests the alpha-linolenic acid (ALA) -- an omega-3 fatty acid -- in flaxseed may be responsible for the effect. Get the details, including the amount of flaxseed used, plus our tests of flaxseed, evening primrose, borage, and other seed oils containing ALA and GLA, in the updated Flaxseed Oil, Evening Primrose Oil, Borage Oil, and Black Currant Oil Supplements Review >>   

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 >>

CL Answer

With herbal supplements, what is the difference between root powder and root extract? Does it matter?

Learn more about the different forms of herbal supplements, including aloe, boswellia, ginkgo, green tea, and milk thistle.

Herbal Supplements

CL Answer

Is echium oil a good alternative to fish oil? I am allergic to fish.

Echium oil as an alternative to fish oil. Learn more for those with fish allergies, including information on omega-3 fatty acids.

Fish Oil Tablets and Liquid on White Background

News Release

August 28, 2015

Not All Vitamin E Supplements Are Alike, Especially "Natural" Ones, ConsumerLab.com Tests Reveal

White Plains, New York, August 28, 2015 — ConsumerLab.com recently tested popular brands of natural and synthetic vitamin E supplements and found that not all vitamin E supplements are the same - with big differences in the types and amounts of compounds they contain.

News Release

December 09, 2014

Round-up of Recent Product Tests by ConsumerLab.com -- Results for B Vitamin Supplements & Energy Drinks, Garlic, NAC (N-acetyl cysteine), Iron and Omega-7 Fatty Acids

White Plains, New York, December 9, 2014 — In recent months, ConsumerLab.com has published test results for a variety of popular supplements, including B vitamins supplements and energy drinks, NAC (N-acetyl cysteine), iron and garlic. In addition, ConsumerLab.

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

News Release

May 07, 2014

Flaxseed and Other Popular Seed Oil Supplements Tested by ConsumerLab.com, But Not All Brands Pass -- Flaxseed, Black Currant, Borage and Evening Primrose Oils Reviewed

White Plains, New York, May 7, 2014 — Plant seed oils are popular supplements that provide omega-3 and omega-6 fatty acids, but which products offer the best value and quality? Recent analyses by ConsumerLab.

Recalls & Warnings

December 15, 2020

FDA Warns Seller of Evening Primrose Oil and Beta Glucan

On December 2, 2020, the FDA issued a warning letter to Smoky Mountain Naturals, LLC following a review of the company's website, which found statements made about the company's products Evening Primrose Oil and Beta Glucan to be drug claims.

CL Answer

What are the health benefits of black cumin seed (black seed) oil?

Find out if black seed oil has health benefits, such as lowering blood pressure or cholesterol, asthma, weight loss, and others. Dosage, forms, including black seed oil and black seed powder, safety information, using black seed oil in foods and more. ConsumerLab.com's answer explains.

Black seed oil benefits -- bowl of black cumin seeds and bottle of oil

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

Clinical Update

7/06/2022

Walnuts for Omega-3s?

Walnuts are often touted as a good source of the omega-3 fatty acid ALA, but can eating walnuts regularly increase blood levels of DHA and EPA (the omega-3s in fish oil)? Find out in the What It Is section of our Black Currant Oil, Borage Oil, Evening Primrose Oil, Flaxseed Oil, and Hemp Oil Supplements Review.

Clinical Update

8/04/2013

Supplement Helps Dry Eye

A supplement containing omega-6 (from black currant seed oil) and omega-3 fatty acids (from fish oil) was recently shown to improve symptoms of dry eye. Get the details about this formula (plus our test results of other omega-3 and -6 fatty acids supplements) in the updated Black Currant, Borage, Evening Primrose, and Flaxseed Oils Review >>

Clinical Update

6/07/2014

Help for Acne from Omega-3 & -6 Oils

A small clinical study found daily supplementation with either omega-3 fatty acids or an omega-6 fatty acid from borage oil significantly reduced the number and severity of acne outbreaks. Get the details, including dosage, and our tests of supplements containing omega-3 and omega-6 fatty acids, in the Fish Oil and Omega-3 Fatty Acid Supplements Review >> and the Flaxseed Oil, Evening Primrose, Borage and Seed Oil Supplements Review >> 

Clinical Update

5/10/2015

Flaxseed Oil for Improving Cholesterol?

A recently published study looked at the metabolic effects of taking daily flaxseed oil on middle-aged men. It found a possible benefit among those with higher triglyceride levels, but overall results were not impressive. More about the study, flaxseed oil, whole flaxseed, and our tests and comparisons of products, is found in the Flaxseed Oil, Evening Primrose Oil, Borage Oil, and Black Currant Oil Supplements Review >>

News Release

February 13, 2014

Calcium, Vitamin C, and Fish Oil Supplements Drop in Use, Probiotics Rise According to ConsumerLab.com Survey

White Plains, New York, February 13, 2014 — A recent survey of over 10,000 people who use dietary supplements shows that the use of calcium, vitamin C and fish oil supplements fell during 2013 while the use of probiotics increased.

CL Answer

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.

How Heat Effects Whey Protein and Creatine -- Scoop of Protein Powder

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

The suggested daily serving for my fish oil supplement, three 1,000 mg softgels, seems like a lot. Do I really need to take this much?

Information on the proper fish oil dosage per day. See the best dosage for different uses, such as lowering triglyceride levels or improving mood, plus information on overdose.

Fish Oil

Product Review

Shelled Walnuts (Halves & Pieces)

See Our Top Picks for Walnuts

Walnuts Review 2023

CL Answer

Is canola oil good or bad for you? I heard it can be toxic.

Find out if canola oil is bad for you or good for you, and whether it helps heart health. Clinical evidence and how it compares to other oils.

Is canola oil good or bad? -- bottle of canola oil

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

Is DPA an important omega-3 fatty acid? It's been promoted as more "powerful" than EPA and DHA.

Find out more about DPA (docosapentaenoic acid), the third most prevalent omega-3 fatty acid in fish oil. Learn how much DPA is in supplements and fish, plus the clinical evidence for DPA, whether it can improve heart health, lower triglycerides and more. ConsumerLab.com's answer explains.

Is DPA an important omega-3 fatty acid? -- Fish Oil Supplements

Recalls & Warnings

November 02, 2012

Maker of Joint Health, Blood Sugar, Prostate, Ginkgo Supplements and More Warned For Drug Claims, Misbranding and Adulteration

On September 10, 2012, the FDA issued a warning letter to Global Source Management & Consulting for making drug claims about the following dietary supplements: Scientific Joint Program capsules, Alpha Lipoic Acid, Healthy Blood Sugar Diabetic Support, Dr.

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

Should olive oil be refrigerated?

Learn if you should store olive oil in the refrigerator to keep it fresher longer.

Olive oil being poured into bowl with bowl of olives in the background

CL Answer

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.

Wild Caught vs. Farm Raised Salmon -- salmon on a dinner plate with fork and knife

CL Answer

When taking a water-soluble version of CoQ10, do I still need to take it with food?

Find out how best to take CoQ10 supplements, with water or food.

water-soluble version of CoQ10

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

News Release

November 25, 2013

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.

News Release

June 18, 2012

What is "Natural" Vitamin E? It Depends On the Brand Selling It, Finds ConsumerLab.com -- New Review of Vitamin E Supplements, Oil and Cream, Including Tocopherols and Tocotrienols

White Plains, New York, June 18, 2012 — What is in a "natural" vitamin E supplement, cream, or oil? According to recent tests by independent evaluator, ConsumerLab.com, this depends completely on the brand selling it.

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

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.

Pycnogenol Health Benefits -- woman with leg pain

CL Answer

How do fish oil supplements compare to EPA prescription fish oil like Vascepa?

How do regular fish oil supplements compare to prescription fish oil such as Vascepa and Lovaza. Info on amounts of EPA and DHA, dose, cost and absorption. ConsumerLab.com's answer explains.

Fish oil supplements vs. prescription fish oil - fish oil capsules

News Release

January 11, 2011

Spoilage and labeling errors found with some omega-3 and -6 supplements; Review of evening primrose, flaxseed, borage, and black currant oil supplements

WHITE PLAINS, NEW YORK — JANUARY 10, 2011 — A new report on the quality of omega-3 and -6 fatty acid supplements made from seed oils was released by ConsumerLab.com today. Only 11 of 17 products selected for testing met quality criteria for freshness and labeling.

CL Answer

To lower my cholesterol, I am taking a phytosterol supplement. Will taking other supplements, like red yeast rice or fish oil, help lower my cholesterol even further?

Learn more about combining phytosterols and other cholesterol-lowering supplements like red yeast rice or fish oil.

Cholesterol

CL Answer

Can taking B vitamin supplements help protect against mosquito bites?

Find out if taking B vitamin supplements can reduce the attraction of mosquitoes to people.

Woman in gray shirt standing outdoors and scratching her arm

CL Answer

Is it okay to take a zinc supplement while I am on an antibiotic for a respiratory infection?

Does zinc interfere with the absorption of antibiotics? Learn more about this and other effects in the body.

Product Review

Extra Virgin Olive Oil Review

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

CL Answer

Is it true that iodine can cause acne or other skin problems?

Information on iodine causing acne and other skin problems such as rashes and hives. ConsumerLab.com's answer explains.

Iodine Causing Acne & Rashes -- box of iodized salt

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

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 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

Avocado Oil Review

Find the Best Avocado Oil for Purity, Freshness and Taste. Some Others May Include Rotten Avocado or Other Oils.

Avocado oil reviewed by ConsumerLab.com

CL Answer

I have low blood pressure. Are there any supplements I should avoid?

Find out which supplements can cause decreases in blood pressure, including melatonin, arginine, magnesium, and calcium.

Man taking blood pressure

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

What is the difference between fish oil and krill oil? Is one better than the other?

Learn which is better for you and compare krill oil vs. fish oil, including evidence from clinical studies, EPA and DHA content, price, and side effects.

CL Answer

Which supplements should be taken with food?

Find out which supplements should be taken with food, including vitamins A, D, E, and K, fish oil, and CoQ10.

Woman holding a pill and showing it to a man while sitting at a table about to eat a meal

CL Answer

Which dietary supplements, health foods or spices contain high levels of lead?

Information about lead and heavy metals in vitamins, supplements and foods. Information on the adverse effects of lead.

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

CL Answer

Is liposomal vitamin C (sold as Lypo-Spheric) better than other forms of vitamin C?

Liposomal vitamin C information, including absorption facts and current evidence.

CL Answer

A red yeast rice ConsumerLab.com showed contained the most lovastatin lowered my cholesterol from 260 to 205. It jumped to 278 when I switched to a cheaper brand! Could it have contained nothing?

Find out if red yeast rice can differ in lovastatin content to lower cholesterol when comparing brands.

Red Yeast Rice Tablet on White Table

CL Answer

Can chocolate and cocoa powder cause eczema?

Does chocolate and cocoa cause eczema? Find out more, including information about nickel and nickel allergies.

Itching 1400

CL Answer

I spend a lot of time in the sun, especially in the summer. Does this mean my vitamin D levels could get too high?

Find out if spending too much time outside, especially in the summer, can cause excess vitamin D levels in the body.

Elderly Couple Sitting on Beach Under Umbrella

News Release

January 08, 2008

ConsumerLab.com finds most potassium supplements meet quality standards, but one with only 18% of ingredient — Results for 12 potassium supplements in new review

WHITE PLAINS, NEW YORK — JANUARY 8, 2008 — A new report on the quality of potassium supplements was released by ConsumerLab.com today. Tests showed one product to contain only 18% of the claimed amount of this essential mineral.

CL Answer

My supplement label warns that it contains a chemical known to the State of California to cause cancer, birth defects, or other reproductive harm, but with no additional information. Do you know why?

Learn more about warning labels indicating that a supplement contains a chemical known to the State of California to cause cancer.

Woman Examining Supplement Bottle

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

Does coconut water help re-hydrate as well as sports drinks?

Find out how coconut water compares to sports drinks, including rehydration and possible side effects.

Coconut Waters Reviewed by ConsumerLab.com

CL Answer

Are red yeast rice supplements legally permitted to contain statins, like lovastatin, since these are drugs?

Learn more about red yeast rice supplements and the varying amounts of lovastatin they contain.

Red Yeast Rice Supplements and Powder

CL Answer

Do probiotics help with lactose intolerance?

Find out if probiotics can help with lactose intolerance. ConsumerLab's answer explains, including some foods that may cause fewer symptoms in the lactose intolerant.

Woman with Stomach Pain Holding Glass of Milk

CL Answer

Is it true that there are bits of plastic in drinking water, specialty salts, or other foods and beverages? How concerned should I be?

Microplastics are tiny pieces of plastic that can end up foods and beverages. Learn about microplastics found in drinking water and specialty salts. ConsumerLab.com's answer explains.

Microplastics in water, plastic bottle of water pouring water into glass

CL Answer

Can vitamins or other supplements cause a change in the ability to taste, or even a loss of taste?

Find out if supplements or vitamin deficiencies can cause changes in taste, loss of taste or smell. Information about vitamin D, zinc, vitamins A, B6, B12 and others. Plus medications and medical conditions that can alter taste and smell. ConsumerLab.com's answer explains.

Vitamin Deficiency, Supplements and Loss of Taste? -- man with salad looking disinterested, unhappy

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

I heard somewhere to avoid chocolate with "processed with alkali" in the ingredients. Is that true?

Learn more about cocoa processed with alkali ("dutched") and its effect on flavanols.

Chocolate Powder in Spoon

CL Answer

How can I find out if my supplement has been tested by ConsumerLab.com?

Find out how to look products up on ConsumerLab.com. Our answer explains.

CL Answer

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.

What to Watch Out for When Choosing a Supplement -- Supplement Bottle Label Close-up

CL Answer

Are there any red flags to look for on the label when choosing a fish oil supplement?

Learn more about safety concerns when choosing a fish oil supplement.

Man Holding Fish Oil Capsule and Water

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

Do any supplements help for 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

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

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

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

Do any supplements help with gum disease or periodontitis?

Supplements for healthy gums may help with gum disease or periodontitis. Learn more about omega fatty acids, lycopene, and probiotics.

Smiling Woman Taking White Supplement with Glass of Water

CL Answer

Should I be concerned about pyrrolizidine alkaloids in herbal supplements?

Find out which herbal supplement ingredients contain pyrrolizidine alkaloids (PAs), learn why these constituents are a safety concern, and find out how supplements containing these ingredients are regulated in the U.S. and Europe.

Herbal capsules being poured out of supplement container onto table

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 I just stop taking alpha lipoic acid, or do I need to taper down?

Learn the best way to stop taking alpha lipoic acid supplements.

Structure of Alpha Lipoic Acid

CL Answer

Just one dose of a horse chestnut extract (standardized to 20% aescin) caused me to have significant nausea and vomiting. Might there be a problem with the product?

Find out if horse chestnut side effects can include gastrointestinal discomfort such as nausea and vomiting.

Man Clenching Stomach

CL Answer

How much dark chocolate equals a tablespoon of cocoa powder?

Learn how much dark chocolate will give you the same intake of flavanols as a tablespoon of cocoa powder.

Flavanols in Dark Chocolate and Cocoa -- Dark chocolate bar and cocoa powder,

CL Answer

Taking 2 grams of L-glutamine in water on an empty stomach (as directed) caused me to be nauseous, dizzy and anxious. Is this a normal side effect of glutamine?

Find out how to prevent nausea, dizziness and anxiety when taking monosodium glutamine in water on an empty stomach.

Glutamine Powder in Scoop for Water

CL Answer

What are the health benefits of holy basil extract?

Learn about the health benefits of holy basil leaf extract. See the clinical evidence for and against holy basil extract for lowering blood sugar in people with type 2 diabetes, reducing anxiety and stress, boosting the immune system, and reducing the pain and inflammation of arthritis. ConsumerLab.com's answer explains.

Holy Basil for Diabetes, Anxiety and Stress? -- Holy basil leaf and pills

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

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

Health Benefits of Olive Oil -- Pouring Olive Oil Into a Bowl

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

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 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

News Release

December 10, 2007

ConsumerLab.com finds improvement in quality of omega-3 and -6 supplements — Results for 22 products made from evening primrose, flaxseed, borage and black currant oils

WHITE PLAINS, NEW YORK — DECEMBER 10, 2007 — A new report on the quality of omega-3 and -6 fatty acid supplements made from seed oils was released by ConsumerLab.com today. Two products were slightly low in one fatty acid, but this is an improvement over results from ConsumerLab.

Recalls & Warnings

March 09, 2022

Court Bars Salud Natural From Selling Aloe, Joint Supplements & More

On March 8, 2022, a federal court ordered Salud Natural Entrepreneur, Inc. to stop distributing nutritional supplements that violate the Federal Food, Drug and Cosmetic Act (FDCA).

Clinical Update

6/07/2014

Fish Oil May Reduce Risk of Blood Clots

A study of more than 20,000 people found that those who ate fish several times per week had a reduced risk of venous blood clots, and that getting additional fish oil from supplements reduced the risk even further. Get the details, including our tests of fish oil and other omega-3 supplements in the Fish Oil and Omega-3 Fatty Acid Supplements Review (Including Krill, Algae, Calamari, Green-lipped Mussel Oil) >>   

Clinical Update

11/18/2020

Heart Risk With Fish Oil

Last week we reported on an increased risk of a serious heart problem with use of prescription fish oil. This week, a study suggested a similar issue with even a lower dose of non-prescription fish oil. See the details in the Concerns and Cautions section of the Fish Oil Supplements Review. Also, see our Top Picks among fish oils.

Clinical Update

9/14/2021

Best Way to Store Olive Oil

Even if unopened, it is best to store extra virgin olive oil (EVOO) at the right temperature, according to results of a recent study. Get the details on the best way to store EVOO in our Extra Virgin Olive Oil Review. Also see our Top Picks among extra virgin olive oils.

Clinical Update

2/07/2023

Fish Oil Absorption

Re-esterified triglyceride forms of fish oil are among the best absorbed forms. But even among these re-esterified forms, there can be differences. Find out what a recent study suggests in the Forms of Fish Oil section of our Fish Oil Supplements Review.

Clinical Update

7/21/2020

Omega-3s and the Brain

To raise levels of DHA and EPA in the brain, large doses are needed according to a recent study. Even larger doses are needed by people with a gene associated with increased risk of Alzheimer's. While the study did not show an effect on people's cognitive scores, it may help explain why some studies with fish oil show little effect. For details, see the What It Does section of the Fish Oil Supplements Review. Also see our Top Picks among fish oils.

Clinical Update

5/08/2021

Seizures from Essential Oils

Although uncommon, certain essential oils have been reported to trigger seizures in people with or without a history of seizures, even when only used topically. Get the details.

News Release

July 12, 2005

ConsumerLab.com finds some supplements lower in omega-3 and omega-6 fatty acids than claimed — Report available for 23 products made from oils of black currant, borage, evening primrose and flax

WHITE PLAINS, NY — July 12, 2005 — ConsumerLab.com has released its latest report on the quality of supplements made from the seed oils of black currant, borage, evening primrose, and flax.

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.

News Release

April 27, 2005

ConsumerLab.com finds quality of most nutrition powders and drinks high, but identifies five protein powders with excess sodium or cholesterol — Report Now Available Online

WHITE PLAINS, NY — APRIL 27, 2005 — ConsumerLab.com has released its latest report on the quality of nutrition powders, shakes and drinks. These products are used for general nutrition, dieting, and meal-replacement and are frequently used by athletes and bodybuilders.

News Release

March 30, 2005

ConsumerLab.com finds most B-vitamins of high quality but three lacking in ingredients — Test Results for 41 Products Reported Along with Information on Use

WHITE PLAINS, NY — MARCH 30, 2005 — ConsumerLab.com reported test results today for B vitamin supplements that it recently purchased in the U.S. and Canada.

News Release

March 14, 2005

ConsumerLab.com reports on vitamin C supplements — Test Results for 29 Products Reported Along with Information on Use

WHITE PLAINS, NY — MARCH 14, 2005 — ConsumerLab.com reported test results today for a wide variety of vitamin C supplements purchased at retail. Vitamin C is the top-selling single vitamin in the U.S., with sales of $770 million in 2003 according to Nutrition Business Journal.

Recalls & Warnings

February 02, 2021

Seller of Aloe Products Warned for Claiming to Treat Joint Stiffness

On January 22, 2021, the FDA issued a warning letter to American Global Health Group, LLC following a review of the company's website, which found statements made about the company's products AloeCure VeraFlex, AloeCure Advanced Formula Capsule, AloeCure Pure Aloe Vera ...

Recalls & Warnings

February 02, 2021

FDA Warns Seller of Reishi Mushroom Supplements

On January 6, 2021, the FDA issued a warning letter to Entia Biosciences, Inc following a review of the company's website, which found statements made about the company's products Lion's Mane - All Natural Supplement, Antrodia Mushroom Powder, Maitake Mushroom Powder, Reishi ...

Recalls & Warnings

February 02, 2021

FDA Warns Seller of Ginger, Echinacea, and More

On December 10, 2020, the FDA issued a warning letter to Prairie Dawn Herbs following a review of the company's website, which found statements made about the company's products Chest Tea, Ginger Oil, Dandelion root Tincture, Echinacea purpurea Tincture, Antispasmodic Tincture, ...

Recalls & Warnings

January 21, 2021

Federal Court Bars Fusion Health From Promoting Vitamin D for COVID-19

On January 8, 2021, the United States Department of Justice announced a permanent injunction has been entered, barring dietary supplement marketer Matthew Ryncarz and his companies Fusion Health and Vitality LLC dba Pharm Origins and Fusion Ionz LLC dba Pharm Origins from making claims that their ...

Recalls & Warnings

January 20, 2021

Seller of Omega-3 Warned for Making Claims to Treat Focus, Mood

On December 9, 2020, the FDA issued a warning letter to Bodyhealth.com, LLC following a review of the company's website, which found statements made about the company's products Healthy-Thin Energize, Body Detox (Oral Spray), and Omega 3 Health to be drug claims.

Recalls & Warnings

January 20, 2021

FDA Warns Seller of Vitamin D, Curcumin and CoQ10 Promoted for Treating COVID-19

On December 28, 2020, the FDA issued a warning letter to Smarter Nutrition, Inc. following a review of the company's website, which found statements made about the company's products Smarter Curcumin, Smarter Ubiquinol, and Smarter Vitamin D3 to be drug claims.

Recalls & Warnings

January 12, 2021

Seller of Cholesterol, Weight Loss Products, and More Warned for Claims

On November 17, 2020, the FDA issued a warning letter to Bonagens following a review of the company's website, which found statements made about the company's products Anti-Aging Supports, Cholesterol & Diabetes Control, Gout Control, Hypertension Control, Liver Supports, Lungs ...

Recalls & Warnings

January 12, 2021

FDA Warns Seller of Joint and Hair Loss Products

On December 22, 2020, the FDA issued a warning letter to Speedwinds Nutrition, Inc. following a review of the company's website, which found statements made about the company's products Synotrex and Sephren to be drug claims.

Recalls & Warnings

January 12, 2021

FDA Warns Seller of Turmeric, Ashwagandha, Glucosamine, and More

On December 18, 2020, the FDA issued a warning letter to Reddy Naturals following a review of the company's website, which found statements made about the company's products Glycostasis, Glucosamine Curcumin, Turmeric 50, Turmeric Curcumin, Cetyl Curcumin, Ashwagandha, Huruli, ...

Clinical Update

1/18/2020

Fish Oils Not Equal on Cardio Benefit

High-dose, highly-concentrated fish oil is known to lower triglycerides in people with elevated levels. One prescription product was even shown to lower the risk of cardiovascular events in such people. However, a clinical trial of another fish oil was recently stopped due to its low likelihood of providing this benefit. Learn how these products differ and how fish oil supplements compare to them in the Prescription Fish Oil vs. Supplements section of the Fish Oil Review. Also see our Top Picks for fish oil and other marine omega-3 supplements.

Clinical Update

7/10/2014

Don't Be Fooled by "Good Source of Omega-3s" Claim

Over the years, ConsumerLab.com has pointed out that products sometimes claim to provide a percentage of the Daily Value (DV) of omega-3 or -6 fatty acids, even though no such Daily Value has been established. Now, the FDA has prohibited certain related statements on omega-3 supplement and food labels that could mislead consumers into thinking a product provides some percentage of this imaginary amount. Get the details, including what to watch out for on labels, plus our tests of fish oil and other omega-3 fatty acid supplements, in the updated Fish Oil and Omega-3 Fatty Acid Supplements Review (Including Krill, Algae, Calamari, Green-lipped Mussel Oil) >> 

News Release

February 08, 2005

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.

Clinical Update

6/20/2014

Too Much Calcium for Some?

A new study found that supplementing with even moderate amounts of calcium may cause abnormally high calcium levels in the urine (a risk factor for kidney stones) of some postmenopausal women, even when total calcium intake doesn't exceed the recommended daily allowance. Get the details in the update to the Calcium Supplements Review (Including Vitamin D, Vitamin K, and Magnesium) >>   

Recalls & Warnings

December 13, 2013

Maker of Menopause Blend and Other Supplement Ingredients Warned by FDA of Violations

On November 21, 2013, the FDA issued a warning letter to Raw Deal, Inc.

News Release

August 07, 2002

ConsumerLab.com finds some spoilage and inaccuracy among omega-3 and 6 supplements — List released of evening primrose, flaxseed and other GLA/ALA products that passed testing

WHITE PLAINS, NY — August 7, 2002 — ConsumerLab.com, an independent evaluator of health and nutrition products, released results today of its Product Review of Black Currant, Borage, Evening Primrose, and Flaxseed Oils: Sources of ALA and GLA (Omega-3 and -6 Fatty Acids).

Clinical Update

2/02/2024

Dirtiest Fruits

Find out which 12 fruits and vegetables have the most pesticides even after washing, and what to do about it, in our article about cleaning produce.

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.

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

June 25, 2002

ConsumerLab.com reviews radioprotective Iodine pills in response to terrorist threats — Quality of products is high, but local access is poor

WHITE PLAINS, NY — June 25, 2002 — In response to the threat of terrorist attacks on U.S. nuclear facilities, ConsumerLab.com, an evaluator of health and nutrition products, today released a Product Review of Potassium Iodide/Potassium Iodate (Radioprotective Agents).

Recalls & Warnings

October 24, 2012

Manufacturer of Green Tea, Vitamin E, Omega-3 and Cranberry Supplements Warned For Manufacturing Violations, Misbranding and Drug Claims

On October 16, 2012, the FDA issued a warning letter to dietary supplement manufacturer Advanced Nutritional Technology Inc.

Clinical Update

6/02/2013

Don't Drink Too Much Tea!

After publication of our Green Tea Review last month, a CL member emailed us about the potential danger of getting too much fluoride from tea. Although this won't happen from just a few cups of tea daily, there have been recent cases where habitually drinking extremely large amounts of tea has caused "fluorosis" causing bone pain and even tooth loss. See the warning (and our tests of green tea products) in the updated Green Tea Review >>

Clinical Update

8/02/2011

Vitamin D and Diabetes Risk

A recent report showed that the risk of developing type 2 diabetes increases when vitamin D intake is low. The increased risk of diabetes is even more dramatic when vitamin D in the blood is below adequate levels. Get the details in the update to the Vitamin D Supplements Review >>.

Clinical Update

4/30/2012

Cancer Findings with Natural Vitamin E

Clinical studies have raised doubts, and even concerns, about the relationship between vitamin E supplements and cancer. However, recent studies in animals suggest the tocopherols found in natural forms of vitamin E may help prevent cancer -- although the results are preliminary. For more about this, and our tests of vitamin E supplements, see the updated Vitamin E Supplements ReviewMore >>

Clinical Update

11/11/2015

Cocoa Flavanol Safety

A new study found that, even at high doses, cocoa flavanols did not cause adverse cardiovascular effects in healthy men and women. However, be aware that drug interactions and certain side effects can occur. Details are provided in the "Concerns and Cautions" section of the Cocoa Powders, Dark Chocolate, Extracts, Nibs & 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

9/14/2016

Raising Vitamin D Levels May Reduce Risk Factor For Breast Cancer

A study among postmenopausal women showed that raising vitamin D blood levels helps reduces blood estrogens, which are a known risk factor for breast cancer. And there's something that reduces estrogen levels even more! For more details, see the "What It Does - Cancer" section of the Vitamin D Supplements Review >>

Clinical Update

5/18/2017

What Iron Supplements Can and Cannot Do

Iron supplements can reduce fatigue in younger women and even improve learning in adolescent girls. If you give blood, taking iron reduces your time to recover by more than one month. However, a recent study found little benefit in giving iron to heart failure patients low in iron. Researchers have an idea why. For details about the uses of iron, see the "What It Does" section of the Iron Supplements Review, which includes our tests and comparisons of popular iron supplements.

Clinical Update

8/17/2019

Green Tea and Blood Sugar

Can drinking green tea reduce the rise in blood sugar after a meal, and if so, is the effect greater in the morning or evening? See what a new study found in the What It Does section of the Green Tea Review. Also see our tests and Top Picks among green tea supplements, and brewable and bottled teas.

Clinical Update

6/27/2020

Fish Collagen Allergy

Be aware that some people may be allergic to fish collagen even if they don't respond to common fish allergy tests, according to a recent study. Get the details in the Concerns and Cautions section of the Collagen Supplements Review. Also see our Top Picks for collagen supplements for skin and for joints.

Clinical Update

7/02/2017

Extra Protein Enhances Training

Even among untrained, middle-aged men, adding protein supplementation to resistance training leads to greater improvements in lean body mass (i.e., more muscle) than the training alone, according to a new study. Find out how much protein helped in the "What It Does" section of the Protein Supplements Review. The Review includes our test-based, quality ratings and comparisons of popular protein powders and drinks.

Clinical Update

1/12/2020

Concern With Ashwagandha

Ashwagandha can increase thyroid hormone levels, resulting in thyroid toxicity, even in people without a history of thyroid disease. Read about a recent case and learn symptoms to look for in the Concerns and Cautions section of the Ashwagandha Supplements Review. Also see our Top Pick among ashwagandha supplements.

Clinical Update

7/14/2020

Precaution When Taking Iron

Supplementing with iron can cause constipation and even bowel obstruction. Find how to reduce these risks when taking iron in the ConsumerTips section of the Iron Supplements Review. Also see our Top Picks for iron.

Clinical Update

6/20/2017

B12 Can Cause Acne

Taking very large doses of vitamin B12 can cause outbreaks of acne -- even in older people, according to a recent report. Learn more in the "B12" section of the B Vitamin Supplements Review >>

Clinical Update

11/20/2018

Soy Can Affect Thyroid

Daily intake of soy isoflavones (as found in soy protein and soy isoflavone supplements) can affect thyroid hormone levels — even in people with normal thyroid function, according to a recent study. For details, see the "Concerns and Cautions" section of the Menopause Supplements Review and the Protein Supplements Review.

Clinical Update

3/30/2019

Green Tea for Lowering Blood Pressure

Drinking green tea can help lower high blood pressure — and even reverse ventricular hypertrophy, according to a new study. For details, including the amount and brand of tea used, see the What It Does section of the Green Tea Review. Also see our Top Picks for green tea.

Clinical Update

5/28/2019

Vitamin B12 & Depression

Deficiencies in B vitamins, such as B12, can cause depression. A recent study suggests that, in pregnant women, even low-normal B12 levels are associated with a much higher risk of depression. For details, see the Depression section of the B Vitamin Supplements Review. Also see our Top Picks for B vitamins.

Clinical Update

7/27/2021

Danger from Too Much Zinc

Getting too much zinc can cause neurologic symptoms, and this can occur even with zinc-containing dental adhesives. Learn more, including the symptoms, in the Concerns and Cautions section of our Zinc Supplements & Lozenges Review.

Clinical Update

8/17/2021

COVID Infectiousness

Be aware that even without symptoms, people with COVID-19 can emit high amounts of virus as aerosols, according to recent research. Get the details and find out what researchers recommend to help protect yourself when indoors.

Clinical Update

7/13/2021

Hidden Forms of B-12 Deficiency

Vitamin B-12 deficiency can occur even in people with "normal" blood levels of B-12, as was most recently reported in a 30-year-old man. Learn more, including the wide range of symptoms of B-12 deficiency and information about testing for B-12 deficiency in our B Vitamin Supplements Review. Also see our Top Picks for B-12.

Clinical Update

5/03/2022

Severe B-12 Deficiency Can Be Missed

B-12 deficiency can cause severe symptoms, even when B-12 levels in the blood are not low, as shown in a recent case. Find out why, and which tests can help, in the B-12 section of our B Vitamin Supplements Review.

Clinical Update

2/23/2024

Kratom Linked to Liver Injury

Use of kratom was linked with acute liver failure in a recent case report. Kratom may cause a variety of adverse effects and even death, particularly when used with other substances. Get the details in our article about kratom.

Clinical Update

2/22/2023

Symptoms of Too Much B-6

High doses of vitamin B-6 from supplements may cause adverse effects, even when doses do not exceed the established tolerable limit for B-6, as highlighted by a recently reported case. Learn about getting too much or too little vitamin B-6 in our B Vitamins Supplements Review, which includes our Top Picks among B-6 and other B vitamin supplements.

Clinical Update

6/20/2023

Zinc Caution

Taking very high doses of zinc, even short-term, can cause dangerously low blood sugar in people with no previous history of low blood sugar, as recently highlighted in a series of reports. Get the details in the Concerns and Cautions section of our Zinc Supplements and Lozenges Review, which includes our Top Picks among zinc products.

Clinical Update

7/08/2022

Which Supplements to Stop Before Blood Work?

Find out which vitamins and supplements can interfere with blood tests, urine and stool tests, and even imaging tests, and when these supplements should be stopped in our new answer to the question: Which vitamins and supplements should be stopped before getting blood work and laboratory tests?

Clinical Update

10/04/2022

Nerve Pain & Vitamin B-6

Vitamin B-6 deficiency can cause nerve pain and weakness, even resulting in inability to walk, as shown in a recent case. However, getting too much B-6 from supplements can also cause these symptoms. Find out how much B6 you should be getting in the Vitamin B-6 section of our B Vitamins Supplements Review.

For information about supplements that may help with other forms of nerve pain, see our answer to the question: Do any supplements, like Nervive, help with nerve pain, like sciatica or diabetic neuropathy?

Clinical Update

11/01/2022

Why is Plastic Found in Salt?

Microplastic particles are showing up in many types of salt, even salt from ancient mines. A CL member asked why. Find out in our updated article about microplastics in water and salt.

Clinical Update

12/27/2022

Coffee and High Blood Pressure

Even modest amounts of coffee may increase risk of heart attack or cardiovascular-related death in people with very high blood pressure, according to recent study. Get the details in our updated article about coffee and heart health.

Also see this recent update: Coffee's Effects on Vitamins & Minerals

Recalls & Warnings

January 23, 2020

Flaxseed Salmonella Risk Prompts Recall

Update: (2/4/20) This recall has been expanded to include additional Nopalina flaxseed products, which are highlighted below.

Recalls & Warnings

December 07, 2023

Belmont Eyecare Warned for Colloidal Silver, MSM, and Castor Oil Eye Drop Claims

On December 1, 2023, the FDA issued a Warning Letter to Belmont Eyecare LLC, following a review of the company’s website, which found statements about the company’s Colloidal Silver Eye Drops, MSM Eye Drops, Organic Daytime Oil Eye Drops, Organic Daytime Oil Eye Drops Small, Organic ...

Clinical Update

8/05/2012

Be Careful with Iodine -- Especially If You're Pregnant

Unlike over-the-counter medicines, dietary supplements are generally not required to carry warning labels, even if they contain toxic amounts of ingredients. If you don't know how much of a vitamin, mineral, or other ingredient you really need, it's easily possible to get too much. This is what seems to have happened to some pregnant women taking a widely-sold iodine supplement, according to a recent medical report. Just one tablet contained 57 times the daily iodine they needed and more than ten times the limit associated with increased risk of toxicity. Their children were born with congenital hypothyroidism, apparently due to getting too much iodine from their mothers.

Find out which product these women took in the updated Iodine section of the Multivitamin Supplements Review. You'll also find appropriate levels of other vitamins and minerals and see which products in the Review did or did not exceed tolerable intake levels of vitamins and minerals. More >>

Clinical Update

10/28/2012

Large Study Suggests Best Vitamin D Level

What's the best level of vitamin D in your body for overall health? One way to answer this question is to compare mortality rates (deaths per year) associated different levels of vitamin D. A new study did just this, reviewing information about thousands of Americans. It concluded the best levels are between 20 and 40 ng/mL, as the risk of dying is fairly similar across this range. However, a closer look at the findings suggests an even smaller range actually associated with the lowest mortality. For the details, as well as our suggestions on how to use vitamin D, and quality ratings of products, see the Vitamin D Review.  More >>

Clinical Update

10/04/2011

Saw Palmetto May Not Work

It's used by many men hoping to reduce urinary symptoms caused by benign growth of the prostate, or BPH, but a new, well-designed study suggests that it doesn't work. Some other recent research suggest the same. Even when doubling and tripling the standard dose, the high-quality saw palmetto extract used in the new study failed to provide benefit.

What should you do? You may want to consider a different supplement -- beta-sitosterol, a phytosterol. The evidence remains fairly good for beta-sitosterol. To find out more about saw palmetto, beta-sitosterol, and the supplements we have tested, see the Prostate Supplements ReviewMore >>

Clinical Update

8/25/2015

Are Green Tea Pills Safe?

Studies have suggested that extracts of green tea can reduce the risk of certain cancers, improve memory, shrink uterine fibroids, and even help with weight reduction. However, liver toxicity has been a concern with green tea extracts. A large, government-funded study recently found that pills of green tea extract can be safe for many people, but some may experience adverse reactions, including elevated liver enzymes. Get the details in the "Concerns and Cautions" section of the Green Tea Review, along with information about what green tea does and our tests of green tea extracts, brewable teas, and beverages >>

Recalls & Warnings

November 21, 2017

Bones and Packaged "Bone Treats" Dangerous for Dogs

Giving your dog real turkey or chicken bones, or packaged "bone treats" could lead to serious injury or death, the FDA recently warned pet owners. 

Recalls & Warnings

February 27, 2018

Dog Treats, Food Recalled Due to Salmonella, Listeria Risk

The following dog treats and dog food are being recalled because they have the potential to be contaminated with Listeria monocytogenes or Salmonella, which can cause illness in pets who consume these products, as well as in pet owners who handle the contaminated products or touch ...

News Release

May 15, 2002

ConsumerLab.com lists magnesium products that passed testing — Some products fail due to excess magnesium and lead contamination

WHITE PLAINS, NY — May 14, 2002 — ConsumerLab.com today released results of its Product Review of Magnesium Supplements. Seventeen of the nineteen products tested by ConsumerLab.com passed the review. Among the products that failed, one contained nearly 50% more magnesium than claimed.

Recalls & Warnings

February 21, 2013

Pet Supplement Company Issues Recall Due To Potential Bacterial Contamination

On February 20, 2013, animal supplement company Nutri-Vet, LLC issued a recall of Nutri-Vet and NutriPet Chicken Jerky Products because they may be contaminated with Salmonella.

Recalls & Warnings

January 24, 2013

Excessive Lead and Mercury Found In Chinese Herbal Supplements

On January 23, 2013, Health Canada warned consumers that certain batches of the Chinese dietary supplements [W.S.

Recalls & Warnings

February 23, 2016

Flax Seed and Chia Powders Recalled

On February 20, 2016, HEALTH MATTERS AMERICA INC., issued a recall of specific lots of Organic Traditions Sprouted Flax Seed Powder and Organic Traditions Sprouted Chia & Flax Seed Powder because they have the potential to be contaminated with Salmonella.

Recalls & Warnings

January 13, 2015

Seller of Speech Disorder Supplement Agrees to Settle FTC Charges of Deceptive Claims

NourishLife, LLC, seller of supplements promoted for treating children's speech disorders, has agreed to pay $200,000 in order to settle FTC charges that claims made on the company's website and in brochures were deceptive and not supported by science.

Recalls & Warnings

May 06, 2014

Seller of Flaxseed, Ginkgo and More Warned for Manufacturing Violations and Drug Claims

On April 18, 2014, the FDA issued a warning letter to Iowa Select Herbs, LLC, following a facility inspection which found the company's products, including Flax Seed, Holy Basil, Papaya Leaf Extract, and Ginkgo Leaf Extract products, to be adulterated because they were prepared, packed, or held ...

Recalls & Warnings

January 16, 2014

Seller of Tea Supplements and Drinks Warned For Manufacturing Violations and Drug Claims

On December 31, 2013, the FDA issued a warning to Prestige Chinese Teas Company, Inc.

Recalls & Warnings

February 24, 2022

Seller of Essential Oils Warned for COVID-19 Claims

On February 22, 2022, the FDA issued a warning letter to My Natural Treatment following a review of the company’s website and Facebook page, which found statements about the company’s thyme, black seed, eucalyptus, rosemary, and peppermint oil products to be drug claims.

Recalls & Warnings

May 05, 2022

Seller of CBD Tinctures, Creams & Pet Products Promoted for Pain, Cancer & More Warned by FDA

On February 11, 2022, the FDA issued a warning letter to Rena’s Organic following a review of the company’s social media and website, which found statements about the company’s 300 mg CBD Full Spectrum Oil Cannabinoid Tincture, 600 mg CBD Full Spectrum Oil Cannabinoid ...

News Release

April 16, 2002

ConsumerLab.com finds "Breast Enhancement" pills lack evidence of efficacy

WHITE PLAINS, NY — April 16, 2002 — ConsumerLab.com announced today that it found no hard evidence to suggest that current dietary supplements marketed for breast enhancement are effective.

News Release

April 03, 2002

More than one in five weight loss, slimming and/or diabetes supplements fail ConsumerLab.com evaluation — Problems found in chromium and pyruvate products; CLA products fine

WHITE PLAINS, NY — April 3, 2002 — ConsumerLab.com announced today that more than one in five products failed its recent Product Review of Weight Loss, Slimming and Diabetes-Management Supplements.

Recalls & Warnings

June 08, 2022

Allergy Bee Nasal Swabs Recalled Due to Potential Contamination With Yeast, Mold & Bacteria

On June 7, 2022, Buzzagogo, Inc. issued a nationwide recall of one lot of Allergy Bee Gone for Kids Nasal Swab Remedy after FDA testing revealed elevated levels of yeast and mold. The agency also warned the recalled swabs may contain the bacteria Bacillus cereus.

Recalls & Warnings

August 07, 2021

Poppy Seed Tea, Unwashed Poppy Seeds Pose Risk of Overdose, Death

Unwashed poppy seeds can be contaminated with significant, even dangerous levels of opioid compounds that can cause serious adverse effects, overdose and death.

Recalls & Warnings

April 11, 2020

FDA Warns Sellers of CBD, Colloidal Silver & Natural Remedies Promoted to Treat Coronavirus

Between April 7 and April 9, 2020, the FDA issued warning letters to five companies for selling products such as CBD, colloidal silver, and natural treatments with unsupported claims that they can treat coronavirus (COVID-19).

Recalls & Warnings

May 16, 2020

CBD Oil Recalled, Risk of High Lead Exposure

On May 15, 2020, Summitt Labs issued a recall of one batch of KORE ORGANIC Watermelon CBD Oil Tincture due to contamination with lead. A random sample of this product tested by the Florida Department of Agriculture and Consumer Services found it to contain lead levels at 4.7 ppm.

Recalls & Warnings

March 09, 2020

FDA Warns Sellers of Essential Oils, Colloidal Silver & Teas Promoted to Treat Coronavirus

On March 9, 2020, the FDA and FTC announced they have issued joint warning letters to seven companies for selling products such as essential oils, teas and colloidal silver with unsupported claims that they can treat coronavirus (COVID-19).

Recalls & Warnings

October 03, 2020

Some "Dairy-Free" Dark Chocolate Found to Contain Undeclared Milk

On October 1, 2020, the FDA announced findings from a study it conducted from 2018 to 2019 that showed that some dark chocolate products claiming to be "dairy-free" or "milk-free" contain undeclared milk.

Recalls & Warnings

June 08, 2018

Caffeine Toxicity a Danger Due to Product Packaging

On May 29, 2018, the FDA issued a warning letter to Dual Health Body and Mind following a review of the company's website which found its Caffeine Anhydrous Powder product to be adulterated because it "presents a significant or unreasonable risk of illness or injury under the conditions of ...

Recalls & Warnings

February 13, 2019

Supplements Promoted for Alzheimer's Disease and Dementia Sell "False Hope," Warns FDA

On February 11, 2019, the FDA warned consumers to beware supplements promoted to prevent or treat Alzheimer's disease or dementia.

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

February 03, 2015

Major Retailers Accused of Selling Adulterated Herbal Supplements

On February 3, 2015, the New York State Attorney General announced that his office sent letters to four major retailers, GNC, Target, Walmart, and Walgreens, for allegedly selling store brand herbal supplement products in New York that either could not be verified to contain the labeled substance, ...

Recalls & Warnings

August 08, 2017

Study Shows Severe Risk in Drinking Hydrogen Peroxide

An analysis of records from the National Poison Data System from a 10-year period ending in 2011 identified 294 reported incidents of people developing adverse symptoms after ingesting 35% (high-concentration) hydrogen peroxide (H202). Among these, 41 (13.

Recalls & Warnings

June 20, 2017

Beware of Bodybuilding Supplements, FDA Warns

On June 20, 2017, the FDA warned consumers to beware of bodybuilding products because a number of these products have been found to contain steroids or steroid-like substances. Such products could cause serious and even life-threatening health risks, including: 

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

May 24, 2016

Seller of Joint Health, Omega-3 Supplements & More Warned for Manufacturing Violations, Drug Claims

On May 13, 2016, the FDA issued a warning letter to Rocky Fork Formulas, Inc.

Recalls & Warnings

September 18, 2015

High Levels of Mercury and Lead Found in Ayurvedic Herbal Supplements

On September 17, 2015, the FDA announced that Shree Baidyanath Ayurved Bhawan Ayurvedic dietary supplements were found to contain high levels of lead and/or mercury, which can cause serious health problems.

Recalls & Warnings

February 12, 2015

Many Dark Chocolate Bars Found to Contain Undeclared Milk

On February 11, 2015, the FDA announced its study of dark chocolate bars found many - including some which did not list milk as an ingredient or were labeled as "dairy-free" or "allergen-free," to contain milk.

Recalls & Warnings

November 06, 2014

Seller of Prostate, Heart Supplements and More Warned for Drug Claims

On October 9, 2014, the FDA issued a warning letter to Health Research Laboratories, LLC/New World Health, following a review of the company's websites, which found statements made about AtheChel Advanced, Betarol, BioTherapex, Omega-3 Cardio Plus, RejuvaLifeRx, and Ultimate Health Formula to be ...

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

October 08, 2015

FDA Warns Seller of Omega-3 "Concussion" Supplement for Drug Claims

On October 1, 2015, the FDA issued a warning letter to MPH Nutrition, LLC, following a review of the company's website which found statements made about  Re:Mind Recover, a supplement promoted for recovery from concussions, to be drug claims which are not permitted for supplements.

Recalls & Warnings

June 20, 2003

Mixing Herbal Supplements, Migraine Medications Can Be Dangerous

On June 19, 2003, ABC News reported than an extensive review of existing research has led University of Utah researchers to conclude several popular herbal supplements may cause adverse, even deadly, reactions when combined with certain migraine medications.

Recalls & Warnings

August 24, 2012

Protein Shots, Drinks and Gelatin Recalled For Potential Botulism Contamination

On August 17, 2012, Protica Inc.

Recalls & Warnings

May 10, 2007

FDA Warns of Two Supplements Containing Pharmaceutical-like Compounds

On May 10, 2007, the FDA advised consumers not to purchase or use "True Man" or "Energy Max" products promoted and sold as dietary supplements throughout the United States.

Recalls & Warnings

June 25, 2014

More Generic Versions of Heart Medication Recalled

As reported in the New York Times on June 24, 2014, certain lots of the blood pressure medication metoprolol succinate extended-release have recently been recalled. The recalling manufacturers are the Indian companies Dr. Reddy's Laboratories and Wockhardt.

Recalls & Warnings

November 26, 2012

Manufacturer of Muscle Building Supplement Containing Steroid Pleads Guilty

On November 15, 2012, Myogenix Corp. pleaded guilty in federal court to knowingly manufacturing and distributing the dietary supplement Spawn, which contained the synthetic steroid Estradienedione/Estra/Tren. Estradienedione is a drug which is not approved by the FDA.