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Product Review

Quercetin & Rutin Supplements Review

Quality's a Concern With Quercetin and Rutin Supplements -- Only 17% of Claimed Amount In One

Product Review

SAMe (S-adenosyl-methionine) Supplements Review

Choose the Best SAMe Supplement. CL Tests Reveal Big Differences in Quality and Cost.

Sam-e supplements reviewed by

Product Review

Holy Basil Supplements Review

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

Holy Basil Supplements Reviewed by

CL Answer

Does Prevagen really improve memory?

Learn more about Prevagen, including clinical studies on Prevagen's impact on memory & cognition, safety, pricing, and an FDA warning letter. ConsumerLab explores the efficacy of Prevagen.

Prevagen for Memory? -- bottle of Prevagen

Product Review

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

See Which B Vitamins Are ConsumerLab's Top Picks!

Review of B Vitamin Supplements

CL Answer

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.

Older woman getting an injection

CL Answer

Do brain games and apps really work and improve memory?

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

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

News Release

March 30, 2023

ConsumerLab Tests Show Not All Quercetin and Rutin Supplements Contain What They Claim

  White Plains, New York, March 30, 2023 — Quercetin is a plant compound found in its natural form, rutin, in foods such as capers, onions, and kale.

News Release

December 16, 2013

What's Really in Turmeric Supplements and Spices? You May Not Want to Know -- 33% of Turmeric/Curcumin Supplements Fail'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.

News Release

January 14, 2013

Lycopene Supplements Vary in Quality and Price According to

White Plains, New York, January 14, 2013 — Lycopene supplements, which contain the red, antioxidant pigment found in tomatoes, vary widely in price and quality, according to a recent review by

News Release

March 30, 2011 finds 100-fold variation in cost of iron supplements

WHITE PLAINS, NEW YORK — MARCH 28, 2011 — 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.

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 today. Only 11 of 17 products selected for testing met quality criteria for freshness and labeling.

News Release

September 10, 2007

Tests of B-vitamins by finds several short on folic acid — New report covers B-complexes, thiamin, niacin, B-6, B-12, biotin and folic acid supplements

WHITE PLAINS, NEW YORK — SEPTEMBER 10, 2007 — Half of the B-complex supplements recently selected by for testing were found to lack the total claimed amounts of folic acid, an essential nutrient also known as vitamin B-9.

News Release

May 15, 2007 finds some alpha lipoic acid supplements come up short — Improper formulation may cause ingredient degradation

WHITE PLAINS, NEW YORK — May 15, 2007 — announced that two of eleven alpha lipoic acid supplements that it recently chose to test contained significantly less ingredient than promised on their labels.

News Release

August 15, 2006

Over 70% of herbal sleep supplements fail tests for quality by — Results for 16 valerian products released today

WHITE PLAINS, NEW YORK — AUGUST 15, 2006 — Most of the valerian dietary supplements recently tested by were low in potency and/or contaminated, the testing company reported today. Valerian, an herbal sleep aid, accounts for approximately $50 million in sales in the U.S.

News Release

August 16, 2005 tests potassium supplements — Report now online for sixteen products

WHITE PLAINS, NY — August 16, 2005 — has released a new report on the quality of potassium supplements. Potassium is used to treat or prevent potassium deficiency caused by diuretic drugs ("water pills"), prolonged vomiting, diarrhea or laxative abuse.

Recalls & Warnings

December 21, 2016

Seller of 5-HTP, Chromium, Curcumin and More Warned for Drug Claims

On December 1, 2016, the FDA issued a warning letter to Aurora Health and Nutrition following a review of the company's website, which found statements made about its products, 5-HTP, Alpha Lipoic Acid, the Argentyn 23 product line, Artecin 90 Vegetarian Capsules, ...

Recalls & Warnings

April 02, 2004

Makers of Fat and Starch "Blockers" Receive FDA Warning Letters

On April 1, 2004, the Food and Drug Administration (FDA)announced that it had sent warning letters to 16 dietary supplement distributors making false and misleading claims for weight loss products promoted over the internet.