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CL Answers (20)

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I would like to try gotu kola for varicose veins but I've heard it's not safe to take. Is that true?

Learn more about gotu kola, including possible benefits for varicose veins and whether it is safe to take. ConsumerLab explains.

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.

Is P-5-P really better than "regular" vitamin B6?

Learn more about pyridoxal-5-phosphate (P-5-P) and vitamin B6.

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

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

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

Woman holding various vitamins and supplements in her hands

Are supplements such as Thyroid Care Plus helpful for hypothyroidism? Can supplements worsen thyroid function? And what is nascent iodine?

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

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

Which sunscreens and after-sun products are contaminated with benzene and which are not?

Over 200 sunscreens and after-sun products have been reported to be contaminated with benzene, a carcinogen. See the results, by brand, and find out what to look for, and what to avoid, when choosing a sunscreen or after-sun product.

Benzene in Suncreen -- Spraying Sunscreen Onto Hand on the Beach

Can lysine, vitamin B-12, or other vitamins or minerals help prevent or reduce canker sores?

Lysine, B12, zinc and other vitamins and minerals for canker sores. Find out what supplements can help prevent or reduce canker sores.

Lysine, Vitamins & Minerals for Canker Sores -- Man with canker sore

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

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

Portable hydrogen water generator

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.

Best COVID Tests, Accuracy, Where to Find & More -- Boy Getting COVID Test

6 Red Flags to Watch Out For When Buying Vitamins & Supplements

When it comes to buying vitamins and supplements, it's buyer beware. ConsumerLab explains six 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

What is TUDCA (tauroursodeoxycholic acid)? Does it have any proven health benefits, and is it safe?

TUDCA information, including its potential health benefits, safety, possible interactions, and cost.

What is Tudca - white capsules poured out of container

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.

A tea called Throat Coat made me lethargic and I was found to have low potassium. Is this a known problem? I was drinking 5 cups a day.

Throat Coat tea information, including licorice root content, potassium loss, and symptoms such as lethargy, increased blood pressure and fluid retention. ConsumerLab.com's answer explains.

Throat Coat Tea and Potassium Loss -- box of Throat Coat tea

How do the Pfizer, Moderna and Johnson & Johnson 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.

Older woman getting an injection

Which supplements can help me sleep and which cause insomnia?

Find out which supplements may improve sleep, including melatonin, L-tryptophan, and magnesium, and which may make sleeping more difficult.

Supplements for Sleep -- woman awake in bed

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

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

Supplements for IBS? -- Women With Stomach Pain

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

What is berberine? Can it really lower blood sugar? Are there any cautions? Which supplements are best?

What is berberine and can it really lower blood sugar for someone with type 2 diabetes? Find out more information about berberine.

Berberine

I read that famotidine (Pepcid) may help treat COVID-19. Is this true? Might a proton pump inhibitor, like Prilosec, help?

Pepcid (famotidine) was reported to improve outcomes in people with COVID-19 in China. But is there evidence that Pepcid really helps to treat COVID-19?

Can Pepcic (famotidine) Treat COVID-19? -- Box of Pepcid and Handout About COVID-19
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Recalls & Warnings (37)

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10/24/2003

Court Closes the Doors on Company That Sold Weight Loss Supplement

12/10/2002

Company Ordered to Cease Deceptive Marketing of Weight Loss Product
4/26/2021

Family Indicted for Selling Dangerous "Bleach" Miracle Mineral Solution As "COVID" Cure
2/06/2004

FDA Seizes Ephedra-Containing Dietary Supplements for Unsubstantiated Athletic Performance Claims
2/15/2013

Energy Drink Recalled Due To Bacterial Contamination
2/14/2013

Protein Drink Recalled Due To Bacterial Contamination
6/21/2010

FDA Warns Parents to Be Careful Giving Vitamin D Drops to Infants
7/14/2020

Sellers of Miracle Mineral Solution Criminally Charged With Making Coronavirus Claims
3/23/2019

DG Health NATURALS Baby Cough Syrup Recalled
7/24/2018

Contaminated Homeopathic Products Recalled

5/30/2017

Beef Bone Broths Recalled
8/04/2015

Whey, Casein and Colostrum Products Recalled

7/15/2013

Two Sexual Enhancement Supplements Recalled
6/30/2013

Weight Loss Supplements Recalled Due To Undeclared Drug
6/12/2013

Weight Loss Supplement Recalled Due To Undeclared Drugs
4/29/2013

Recall: Multivitamin Containing Undeclared Milk
3/21/2013

Probiotic Recalled Due To Undeclared Soy
3/13/2013

Recall: Male Sexual Enhancement Supplement Containing Drugs

3/06/2013

Protein Bar Recalled Due To Salmonella Risk
3/06/2009

"The Truth About Nutrition" Marketers Agree to Pay $3 Million to Settle Charges of Deceptive Advertising of Dietary Supplements and Devices
2/07/2013

Growth Factor Supplement For "Size, Strength and Stamina" Recalled Due To Potential Contamination
9/18/2012

Men’s Sexual Enhancement Supplement Containing Prescription Drug Recalled
11/18/2003

Supplement Promoted As Cancer Treatment Removed from Market
10/10/2003

Government Stops Sale of Supplements Claiming to Treat Obesity and Impotence

9/29/2003

FDA Seizes Bogus Dietary Supplement That Claims to Cure Cancer
5/05/2003

FDA Reports False Claims by Maker of HGH Supplement
7/21/2003

FTC Stops False Advertising of Heavily Promoted Supplements for Breast Enhancment, Male Virility, and Snoring
6/05/2012

Many "Grapefruit Seed Extracts" Adulterated
3/02/2005

Marketer of Weight-Loss System Settles FTC Charges of Deceptive Advertising
4/01/2004

Aloe Producer Recalls Product Due to Toxic Levels of Vitamin D
4/08/2003

FDA Acts Against Potentially Risky Products Illegally Marketed as Street Drug Alternatives
6/21/2002

Canadian Warning on Use of Seven Herbal Supplements from BotanicLab
1/27/2003

FTC Charges Dr. Clark and Related Companies with Making Unsubstantiated Health Claims
3/19/2004

Seasilver Stopped from Making Claim to Cure "Over 650" Diseases
9/17/2003

FDA Warns of Illness from Star Anise Teas
6/20/2003

FTC Charges Marketers of Seasilver with False and Deceptive Claims
9/27/2010

FTC Charges Deceptive Advertising by POM Wonderful
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Clinical Updates (1)

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

1/13/2017

Melatonin Quality Concern
A recent Canadian study found that 71% of melatonin supplements did not contain within 10% of labeled amounts of melatonin. Certain types were more likely to be off-the-mark than others. For details, and our own tests of (U.S.) products, see the "Quality Concerns" section of the Melatonin Supplements Review >>

News Releases (46)

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

8/27/2021

ConsumerLab Tests Reveal Best Joint Health Supplements for People and Pets
5/18/2021

Caution With Potassium Supplements: You Could Get More Than Expected
2/25/2021

Top-rated Vitamin and Supplement Brands and Merchants for 2021 Based on Consumer Satisfaction -- Results of the ConsumerLab.com Survey of Vitamin & Supplement Users
4/28/2020

Best and Worst Multivitamins Revealed by ConsumerLab -- Problems Found With 44% of Multis Tested
2/25/2020

Top-rated Vitamin and Supplement Brands and Merchants for 2020 Based on Consumer Satisfaction -- Results of the ConsumerLab.com Survey of Vitamin & Supplement Users
9/27/2019

Best Turmeric and Curcumin Supplements and Spices Identified by ConsumerLab
7/31/2019

ConsumerLab Tests Reveal Best CoQ10 and Ubiquinol Supplements
2/25/2019

Top-rated Vitamin and Supplement Brands and Merchants for 2019 Based on Consumer Satisfaction -- Results of the ConsumerLab.com Survey of Vitamin & Supplement Users
10/02/2018

Best Joint Health Supplements Identified -- ConsumerLab Tests Glucosamine, Chondroitin, MSM and Boswellia Supplements for People and Pets
2/25/2018

Top-rated Vitamin and Supplement Brands and Merchants for 2018 Based on Consumer Satisfaction
1/04/2018

ConsumerLab.com Reveals Its Top Picks for Best Iron Supplements
11/27/2017

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
11/01/2017

Gummies Are Most Likely to Fail Testing in Review of Multivitamins -- Best and Worst Multivitamins Identified by ConsumerLab Testing
9/26/2017

ConsumerLab.com Explains How to Take Melatonin and Reveals Its Top Supplement Picks
5/17/2017

Best Vitamin D? ConsumerLab.com Tests Popular Vitamin D Supplements and Reveals Its Top Picks
2/25/2017

Top-rated Vitamin and Supplement Brands and Merchants for 2017 Based on Consumer Satisfaction
2/23/2017

ConsumerLab.com Reveals Best and Worst B Vitamin Supplements and Why Current Labels Often Mislead
12/21/2016

Best CoQ10? ConsumerLab.com Tests Popular CoQ10 and Ubiquinol Supplements and Reveals Its Top Picks
11/15/2016

ConsumerLab.com Finds Arsenic in Testing of Potassium Supplements -- Safer Choices Identified. Many Americans May Need More Potassium
9/13/2016

Best Fish Oil? ConsumerLab.com Tests 44 Popular Omega-3 Supplements and Identifies Its Top Picks
6/03/2016

What Works for Joint Health? ConsumerLab.com Reviews Glucosamine, Chondroitin, MSM and Boswellia Supplements for People and Pets
3/05/2015

ConsumerLab.com Shows Chinese Consumers What's Really in Foods and Supplements -- U.S. Testing Company Expands to China, Launches cn.ConsumerLab.com
10/08/2013

ConsumerLab.com Reports Problems and “Top Picks” Among Bars for Energy, Fiber, Protein, Meal-Replacement, and Whole Food
6/11/2013

31% of Protein Powders and Drinks Fail Tests by ConsumerLab.com
2/01/2013

Top-rated Vitamin and Supplement Brands and Merchants for 2013 Based on Consumer Satisfaction
4/26/2012

ConsumerLab.com reviews prostate supplements with saw palmetto and/or beta-sitosterol and finds few likely to be effective
3/12/2012

Review of vitamin C supplements by ConsumerLab.com finds many of high quality but a wide range in prices
2/01/2012

Top-rated vitamin and supplement brands and merchants on consumer satisfaction for 2012 -- Based on ConsumerLab.com Survey of Vitamin & Supplement Users
6/16/2011

ConsumerLab.com puts multivitamins to the test
4/26/2011

Problems discovered with eight vitamin D supplements in study by ConsumerLab.com -- Incorrect amounts of vitamins, lead contamination, and labeling infractions identified.
3/08/2011

ConsumerLab.com reviews CoQ10 and ubiquinol supplements -- Tests show quality to be high, but large differences found in dosage, formulation, and cost
2/01/2011

Top-rated vitamin and supplement brands and merchants on consumer satisfaction for 2011 -- Based on ConsumerLab.com survey of vitamin and supplement users 
1/31/2011

Vitamin D use increased 52% in past two years according to ConsumerLab.com survey of supplement users -- Fish oil continued to surpass multivitamins as most popular supplement and Internet was most common place to buy supplements
1/25/2011

ConsumerLab.com evaluates quality of potassium supplements and identifies those offering best value
6/30/2010

Echinacea supplements vary widely in ingredients but found clear of contaminants according to ConsumerLab.com -- New review guides consumers through wide range of dosage, species, preparations, and formulas in echinacea products
2/01/2010

Top-rated supplement brands and merchants for consumer satisfaction for 2010; Based on ConsumerLab.com Survey of Vitamin & Supplement Users
7/10/2009

Nine joint health supplements fail ConsumerLab.com quality review -- Lead contamination, missing ingredients and other problems found in supplements for people as well as for dogs, cats and horses; Many others approved
3/31/2009

ConsumerLab.com Warns of Problems with Multivitamins and Vitamin Water -- Defects Found in Over 30% of Supplements Selected for Testing; Several Popular Children's Multis Exceed Tolerable Limits
2/03/2009

Survey shows fish oil nearly as popular as multivitamins among supplement users.  Most also take calcium and CoQ10 -- ConsumerLab.com publishes 2009 Report on Vitamin & Supplement Users, including top-rated brands and merchants. 
1/13/2009

ConsumerLab.com reports largest test of CoQ10 and ubiquinol supplements -- Most supplements provide claimed ingredient, but large variation in dosage and forms may confuse consumers.  ConsumerLab.com provides guidance.
3/07/2008

ConsumerLab.com finds most vitamin C supplements pass quality tests but one short on ingredient and some exceed tolerable levels
2/15/2007

ConsumerLab.com survey shows brands and merchants rated highest by dietary supplement users
1/19/2007

Consumers warned of problems with multivitamins — ConsumerLab.com uncovers defects in over half of products tested
3/13/2001

ConsumerLab.com review of vitamin E supplements finds some insufficiencies and need for clearer labeling; test results released online today
8/07/2000

ConsumerLab.com finds that not all creatine supplements meet label claims; Popular sports supplement test results released online
8/05/1999

ConsumerLab.com initiates independent testing of herbal products and supplements. Certification Seal announced.
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Results
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  2. CL Answers
  3. Recalls & Warnings
  4. Clinical Updates
  5. News Releases