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Product Review

Red Yeast Rice Supplements Review

50% of Red Yeast Rice Supplements "NOT APPROVED" in CL Tests

Product Review

Cinnamon Supplements and Spices Review

CAUTION: Some Cinnamon Products High in Toxin. See Which Passed or Failed and our Top Picks! .

Cinnamon Supplements and Spices Tested by

News Release

12/10/2014 Identifies Best Zinc Products for Colds, Eyes, and Zinc Deficiency -- Popular Zinc Supplements and Lozenges Tested and Compared

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

News Release


50% of Red Yeast Rice Supplements Fail ConsumerLab Tests

  White Plains, New York, May 26, 2022 — Red yeast rice naturally contains cholesterol-lowering lovastatin compounds. However, recent ConsumerLab tests of popular red yeast rice products on the market revealed many did not contain any detectable lovastatin. Even among products that contained lovastatin, most did not contain a daily dosage known to be effective in lowering cholesterol, and several were contaminated with concerning levels of citrinin, a potential kidney toxin.

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

News Release


Best B Complexes, B12, and Other B Vitamin Supplements Revealed by ConsumerLab Tests: Beware of High Doses

  White Plains, New York, June 14, 2022 — Recent ConsumerLab tests of over 30 popular vitamin B complexes and supplements revealed that four products contained either much less, or much more, of at least one B vitamin listed on the label. One B complex, for example, contained only 79% of its B12, while another fell short on three key B vitamins, providing between just 69% to 80% of the thiamin, pantothenic acid and folic acid listed on its label.

News Release


Few Red Yeast Rice Supplements Provide Enough Cholesterol-Lowering Compounds to Likely Be Effective, ConsumerLab Tests Reveal

White Plains, New York, August 24, 2018 — Research shows that red yeast rice, which contains naturally-occurring lovastatin compounds, can lower "bad" LDL cholesterol. However, because amounts of lovastatins are not typically listed on supplement labels, consumers have no way knowing if they are taking an effective dose. Recent ConsumerLab tests of red yeast rice supplements on the market found most did not contain amounts of lovastatins shown to lower cholesterol in clinical trials. Amounts of lovastatins in certain products were also found to have decreased substantially since the same products were tested by ConsumerLab several years ago.

News Release


Best Supplements for Bone Health? Finds Products with Multiple Ingredients More Likely to Contain Wrong Amounts

White Plains, New York, April 28, 2015 — Vitamin D and calcium each play a crucial role in bone health and are among the most popular supplement ingredients in the U.S., but recent tests found 3 out of 25 popular products containing vitamin D and calcium (including some with vitamin K) contained either too much or too little of a key ingredient. Interestingly, the problems were only found in products which contained multiple ingredients.

News Release


Caution With Cinnamon: ConsumerLab Tests Reveal High Amounts of Toxin in Some Supplements and Spices

White Plains, New York, December 11, 2020 — Cinnamon is a favorite spice that may modestly help lower blood sugar levels, likely due beneficial proanthocyanidins (PACs). However, the most common type of cinnamon, cassia cinnamon, can contain significant amounts of coumarin, a liver toxin and potential carcinogen, and heavy metals — particularly, lead. So which cinnamon supplements and spices provide the best quality cinnamon, without high amounts of coumarin, at the lowest cost?

News Release


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

White Plains, New York — December 20, 2011 — Can zinc supplements shorten colds and reduce the progression of advanced macular degeneration? "Yes, but not all supplements provide a dosage that has been proven effective." says Tod Cooperman, M.D., President of recently purchased popular zinc supplements, testing their contents and reviewing their dosage against product shown to work in clinical studies.

News Release


Problems discovered with eight vitamin D supplements in study by -- Incorrect amounts of vitamins, lead contamination, and labeling infractions identified.

White Plains, New York — April 26, 2010 — Among 28 vitamin D supplements recently selected for independent testing, problems were found with 8 products, 29% of those reviewed, according to Vitamin D plays a critical role in bone health and higher levels in the blood are associated with reduced risk of heart attack, depression, rheumatoid arthritis, asthma and other conditions. Vitamin D has become one of the most popular supplements in the U.S. with sales rising from $72 million in 2006 to $429 million in 2009 according the Nutrition Business Journal. It was the fourth most popular supplement in a survey of its readers in 2010, used by 56% of respondents. In the recent tests, evaluated vitamin D supplements as well as those containing calcium and/or vitamin K. Results were released today in three separate Product Review reports on Vitamin D, Calcium, and Vitamin K supplements.

News Release


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

White Plains, New York, June 25, 2019 — B vitamins and complexes are among the most popular supplements sold in the U.S. because B vitamins are essential for a wide range of functions in the body. Supplementation with B vitamins can help offset inadequacies in the diet and difficulties in extracting and absorbing B vitamins from foods, as is common in older people and those taking medicine that lowers stomach acid. But many people who take B vitamins may be getting much more than they need, or than they expect from labels according to recently published test results by