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Product Review

NAD Booster Supplements Review (NAD+/NADH, Nicotinamide Riboside, and NMN)

How Important Is Boosting NAD+ Levels? Find Out and Learn How Booster Supplements Compare.

NAD Boosters (NAD+/NADH, Nicotinamide Ribose, and NMN)

Product Review

Huperzine A Supplements Review

Choose the Best Huperzine A Supplement. CL Tests Reveal the Best Huperzine A Supplements for Memory.

Huperzine A Supplements Tested by ConsumerLab.com

Recalls & Warnings

10/25/2016

FDA Warns Maker of Sublingual Melatonin and Progesterone Cream

On October 12, 2016, the FDA issued a warning letter to Threshold Enterprises, Ltd. (manufacturer of Source Naturals supplements), following a facility inspection which found the company's products to be adulterated because they were prepared, packed, or held under conditions that violate Current Good Manufacturing Practices for dietary supplements. These violations include failure to establish finished product specifications for each dietary supplement manufactured for the identity, purity, strength, and composition of the finished batch of the dietary supplement, and for limits on those types of contamination that may adulterate, as required by federal regulations. In addition, the FDA noted that Source Natural's sublingual melatonin products are not dietary supplements because they are taken sublingually - made to dissolve under the tongue rather than swallowed. Dietary supplements must be intended for ingestion. Similarly, the FDA noted that Source Naturals Progesterone Cream was not considered a dietary supplement, as it is applied topically. The FDA considers these products to be drugs based on how their labels describe their use, but since neither product has been submitted and approved by the FDA as a drug, they are considered "unapproved drugs". (See Are lozenges and sublingual pills considered dietary supplements? for more about this.) Also see ConsumerLab.com's Reviews of Melatonin Supplements and Menopause Supplements and Progesterone Creams for tests of related products. See Related Warnings: Seller of Sublingual Vitamins Warned for Drug Claims Seller of Herbal Formulas for Cholesterol, Prostate & More Warned For Drug Claims Seller of Vision Supplements Warned for Drug Claims Maker of Vitamin K, Vitamin A & More Warned for Manufacturing Violations, Drug Claims Seller of "Hangover" Supplement Warned for Manufacturing Violations & Drug Claims Seller of "Natural" Cough Syrup Warned for Manufacturing Violations, Drug Claims Maker of Aloe, Weight Loss Supplements and More Warned for Manufacturing Violations, Drug Claims To read the FDA's warning letter, use the link below.

Product Review

Menopause Supplements Review (Soy and Red Clover Isoflavones, Black Cohosh) and Progesterone Creams

Choose the Best Menopause Supplement. Find Out Now Which Soy Isoflavone, Red Clover, Black Cohosh, and Progesterone Products Have the Active Compounds You Want!

Menopause Supplements Tested by ConsumerLab.com -- Soy and Red Clover Isoflavones, Black Cohosh, and Progesterone Cream

Product Review

Lycopene Supplements Review

Find the Best Lycopene Supplements. CL Tests Reveal That Not All Lycopene Supplements Contain What They Claim.

Lycopene Supplements Reviewed by ConsumerLab.com

Product Review

Ginkgo (Ginkgo Biloba) Supplements Review

Choose the Best Ginkgo Biloba Supplement. Finding Real Ginkgo Isn't Easy — 60% Fail ConsumerLab's Tests of Quality.

Ginkgo Biloba Supplements Tested by ConsumerLab.com

Product Review

Vitamin D Supplements Review (Including Calcium, Magnesium, Boron, and Vitamin K)

Find the Best Vitamin D Supplement with the Right Dose

Product Review

Chromium Supplements Review

Chromium Supplements Review. Best Chromium Supplements Identified -- By Strength.

Chromium Supplements Reviewed by ConsumerLab.com

Product Review

L-Theanine Supplements Review

Find the Best L-Theanine Supplement. Find Out If L-Theanine Helps for Stress and Which Products Are Best.

L-Theanine Supplements reviewed by ConsumerLab.com

Product Review

Bilberry Supplements Review

Choose the Best Bilberry Supplement. Some Bilberry Is Not Authentic!

Bilberry Supplements Reviewed by ConsumerLab.com

Product Review

Lysine Supplements Review

Choose the Best Lysine Supplement. CL Tests Reveal Which Lysine Supplements Provide the Best Quality and Value.

Product Review

Lactose Intolerance Products Review (Lactase Enzyme Supplements and Lactose-Free Milks)

Choose the Best Lactase Enzyme Supplement and Lactose-Free Milk. Find a CL Approved Lactose Intolerance Product.

Lactase Supplements Reviewed by ConsumerLab.com

Product Review

Quercetin Supplements Review

Find the Best Quercetin Supplements. ConsumerLab Tests Reveal Not All Quercetin Supplements Contain What They Claim.

Quercetin Supplement Reviewed By ConsumerLab.com

Product Review

Melatonin Supplements Review

Find the Best Melatonin Supplements. Trouble Sleeping? See CL's Tests of Melatonin Supplements and Top Picks.

Melatonin Supplements Reviewed by ConsumerLab.com

News Release

6/15/2005

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. ConsumerLab.com found two products to contain approximately 2 micrograms of lead per daily dose — more than the amount permitted in California without a warning label. Nineteen other products passed the testing by meeting the standard for lead contamination, containing their claimed amounts of magnesium, and, if tablets or caplets, breaking apart properly for delivery in the body.

Product Review

Vitamin E Supplements Review

Find the Best Vitamin E Supplement. Tests and Reviews of Popular Vitamin E Supplements & CL's Top Picks.

Vitamin E Supplements, Cream, and Oil Tested by ConsumerLab.com

Product Review

Weight Loss Supplements Review (7-Keto DHEA, Forskolin and Stimulant Blend Supplements)

Choose the Best Weight Loss Supplement. Be Careful With Weight Loss Supplements — Few Pass Quality Testing and Safety Review.

Weight Loss Supplements Tested by ConsumerLab.com

Product Review

Potassium Iodide (KI) and Iodate (KIO3) Radioprotective Pills Review

Learn How to Choose the Best Radioprotective Iodine Pill and Use It Properly

News Release

8/13/2015

Feeling Stressed? ConsumerLab.com Reviews the Evidence for L-Theanine and Test Popular Products

White Plains, New York, August 21, 2015 — L-theanine is often promoted to reduce stress, and for conditions such as ADHD — but does it really work? ConsumerLab.com recently reviewed the evidence and purchased popular brands of L-theanine to test their quality. While products selected for testing contained their claimed amounts of L-theanine and met other quality criteria, they differed significantly in dose and price, with some high quality supplements costing nearly one-third less than other brands.

News Release

12/10/2014

ConsumerLab.com 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 ConsumerLab.com. ConsumerLab.com recently purchased popular zinc supplements and lozenges, reviewed their dosage, and tested their content and properties.

News Release

10/07/2009

ConsumerLab.com finds that only two-thirds of alpha-lipoic acid supplements selected for testing pass quality review -- Anti-oxidant supplements helpful to diabetics

White Plains, New York — Wednesday, October 7, — Alpha-lipoic acid (also called lipoic acid) is a natural anti-oxidant that can help diabetics reduce symptoms of peripheral neuropathy and control blood sugar, among other uses. ConsumerLab.com recently purchased a range of brands of alpha-lipoic acid supplements and tested their quality. Results of the tests, now available on ConsumerLab.com, show that two brands contained less alpha-lipoic acid than promised on their labels. Similar problems have been reported by ConsumerLab.com in past years. A third supplement failed the review for making health claims that the FDA only permits on drugs. The remaining seven alpha-lipoic acid products selected for testing by ConsumerLab.com met standards for ingredient quality, as did five other products that passed ConsumerLab.com's Voluntary Certification Program. None of the alpha-lipoic acid products exceeded contamination limits for lead.

News Release

4/26/2012

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

White Plains, New York April 26, 2012 — Can supplements reduce the symptoms of prostate enlargement in men, as some products claim? ConsumerLab.com researchers recently tackled this question, investigating the evidence behind prostate supplements and testing the quality of these products. ConsumerLab's review found that supplements with a certain amount of beta-sitosterol (a type of phytosterol) may reduce symptoms of BPH (benign prostatic hyperplasia) but the latest and most reliable studies show no benefit for saw palmetto supplements. Neither ingredient is useful in treating prostate cancer. Analytical tests found several supplements with levels of beta-sitosterol likely to be effective, but ConsumerLab.com discovered that one beta-sitosterol supplement would not properly break apart and may not fully release its ingredients. Most saw palmetto supplements contained their listed amounts of the herb, while the labels of two "prostate formulas" --consisting of multiple ingredients -- made disease treatment claims on their labels which violate FDA regulations.

News Release

7/31/2013

Watch Out for Fake Bilberry Supplements, Cautions ConsumerLab.com

WHITE PLAINS, NEW YORK July 31, 2013 — Extracts of bilberry, a cousin of blueberry, may help improve vision and have other health benefits, but some bilberry supplements may not contain real bilberry extract -- the type used in most clinical studies. ConsumerLab.com recently purchased and tested several popular brands of bilberry supplements for authenticity, purity, and the ability of tablets to properly disintegrate. Only 75% of the products passed testing. One supplement contained only 62% of its promised bilberry compounds and appeared not to be authentic, and another failed to break apart fast enough in disintegration testing.

News Release

7/22/2014

Which Supplements Help Lower Cholesterol? ConsumerLab.com Identifies Best Products by Reviewing Evidence and Testing Quality

White Plains, New York, July 21, 2014 — Certain dietary supplements can help reduce elevated cholesterol levels. A new report from ConsumerLab.com reviews the evidence behind each of the popular cholesterol-lowering ingredients and provides test results for twelve supplements. Among those proven to work are plant sterols, also known as phytosterols, which bind cholesterol in the gut. ConsumerLab.com tested several sterol supplements. One product appeared to be best -- having clinical evidence to support it and being lowest in cost.

News Release

5/05/2015

ConsumerLab.com's Tests of Digestive Enzyme Supplements Reveal What Labels Don't

White Plains, New York, May 5, 2015 — How do you know if your digestive enzyme supplement is truly active? The only way to know for sure is to test it on fats, carbohydrates, proteins and other parts of food which it is expected to digest. That's exactly what ConsumerLab.com recently did with nine popular digestive enzyme supplements purchased online and from retail stores. It found that seven of the products had the major enzyme activity claimed, but two did not. Digestive enzyme supplements are among the most popular supplements, used by 25.9% of people who use supplements, according to a recent ConsumerLab.com survey.

News Release

5/28/2015

ConsumerLab.com Shows How to Choose the Right Melatonin Supplement for Sleep

White Plains, New York, May 28, 2015 — An estimated 60 million Americans experience insomnia each year, according to the National Institutes of Health, and they increasingly turn to the supplement melatonin for potential help. In fact, U.S. sales of melatonin increased 16.7% in 2014 to $378 million, according to Nutrition Business Journal. While melatonin supplements can help some people to fall asleep, differences among products, as reported recently by ConsumerLab.com, can leave anyone trying to choose the right product tossing and turning.

News Release

9/19/2015

ConsumerLab.com Tests Popular Prostate Supplements with Saw Palmetto and Beta-Sitosterol

White Plains, New York, September 19, 2015 — Can prostate supplements with ingredients such as saw palmetto or beta-sitosterol improve symptoms of an enlarged prostate, a condition affecting more than half of men over age 60? And, if so, which supplements are properly made and labeled and deliver an appropriate dose? To answer these questions, researchers at ConsumerLab.com reviewed the clinical evidence and tested popular prostate supplements.

News Release

2/09/2016

Lysine: Does It Work for Cold Sores and Which Brands Are Best? -- ConsumerLab.com Reviews the Evidence and Tests Supplements Often Used to Prevent Herpes Eruptions

White Plains, New York, February 9, 2016 — Lysine is an essential amino acid often taken as a supplement to prevent cold sores, genital herpes lesions, and canker sores. It's also given to cats with feline herpesvirus 1. But does it really work? And which products are best? To find out, ConsumerLab.com recently selected and purchased twelve lysine supplements and tested them to see whether they contained their claimed amounts of lysine and if tablets could properly release their contents.

News Release

4/01/2019

Not All Quercetin Supplements Contain What They Claim, ConsumerLab Tests Reveal

White Plains, New York, April 1, 2019 — Quercetin is a flavonoid found in foods such as onions, kale and apples. Sold as a supplement, quercetin is promoted to help with a range of conditions including prostatitis, asthma, and rheumatoid arthritis, as well as blood sugar control. But do quercetin supplements really work, and if so, which products contain what they claim and provide the best quality and value?

News Release

9/26/2017

ConsumerLab.com Explains How to Take Melatonin and Reveals Its Top Supplement Picks

White Plains, New York, September 26, 2017 — Melatonin is now one of the most popular supplements, largely due to its proven ability to trigger sleep. But what is the best way to take melatonin in order to help you fall asleep, and stay asleep? And with so many different forms and doses of melatonin available from supplements on the market, how do you know which product is right for you?

News Release

3/07/2018

Finding Real Ginkgo Isn't Easy, ConsumerLab's Tests Reveal

White Plains, New York, March 7, 2018 — Recent tests of popular Ginkgo biloba supplements sold in the U.S. found that only 4 of 10 were confirmed to contain their listed amounts of real ginkgo extract. Ginkgo supplements are often promoted to improve memory and to help with other conditions such as vertigo and Raynaud's disease, but they can also be very expensive to manufacture. As a result, ginkgo supplements may be among the most adulterated herbs on the market — often spiked with compounds from other plants that can make low-quality ginkgo appear to be higher in quality.

News Release

1/15/2019

Not All Lycopene Supplements Contain What They Claim, ConsumerLab Tests Reveal

White Plains, New York, January 15, 2019 — Foods rich in the antioxidant lycopene, like tomato juice and paste - may reduce the risk of certain cancers and have heart-health benefits, and preliminary studies suggest that lycopene supplements may also be helpful. But do lycopene supplements on the market contain what they claim, and if so, which products provide the best quality and value?

News Release

7/31/2015

ConsumerLab.com Tests Reveal What's Really in Menopause Supplements and Creams -- Soy Isoflavone, Red Clover, Black Cohosh, and Progesterone Products Reviewed

White Plains, New York, July 31, 2015 — Women looking for relief from hot flashes and other menopausal symptoms often turn to supplements containing estrogen-like isoflavones (from soy or red clover) black cohosh, or creams containing progesterone — but it may be difficult to choose the right one because labels usually don't list amounts of active compounds. ConsumerLab.com recently tested popular menopause products, determined amounts of active compounds, and identified those providing amounts shown to be effective in clinical studies. The results reveal that amounts of active compounds can vary significantly among products. In products with soy, for example, amounts of genistein, an isoflavone thought to be key for reducing hot flashes, ranged from just 0.61 mg to 32.1 mg per recommended daily serving.

News Release

7/10/2018

Best Chromium Supplements Identified by ConsumerLab

White Plains, New York, July 10, 2018 — Chromium supplements are promoted to help control blood sugar in people with type 2 diabetes and with weight loss. But do they really work, and if so, which products are the best quality and provide the right dose of chromium for different needs? To answer these important questions, ConsumerLab recently purchased and tested popular chromium supplements for their amounts of chromium as well as for a potentially toxic form of chromium known as hexavalent chromium, and it carefully reviewed clinical literature regarding the effects of chromium.

News Release

1/25/2011

ConsumerLab.com evaluates quality of potassium supplements and identifies those offering best value

WHITE PLAINS, NEW YORK — JANUARY 25, 2011 — A new report on the quality of potassium supplements was released by ConsumerLab.com today. In contrast to its last report on potassium supplements, ConsumerLab.com found that each product selected for review contained the claimed amount of this essential mineral, did not exceed contamination limits for lead, and, if a pill, was able to properly break apart. The cost to obtain 99 mg of potassium, a common serving size, varied from 1 cent to 34 cents, although those costing the most provided magnesium as well as potassium.

News Release

10/13/2011

30% of SAM-e supplements selected for review fail to pass ConsumerLab.com testing -- Cost of SAM-e found to vary 5-fold

White Plains, New York, October 13, 2011 — Dietary supplements with SAMe (S-adenosyl-methionine) are used to treat osteoarthritis as well as depression, but only 7 out of ten SAM-e supplements recently selected for testing by ConsumerLab.com met all quality criteria. No SAM-e was found in one supplement and another provided only 75% of its listed amount of the ingredient. The enteric coating on a SAM-e product for dogs and cats did not last long enough to properly protect the contents of the pill. Nearly all SAMe supplements are enteric coated to protect the SAM-e from degradation and prevent stomach upset.

News Release

8/15/2020

ConsumerLab Tests Show Not All Vitamin E Supplements Contain What They Claim

White Plains, New York, August 15, 2020 — Vitamin E is an antioxidant that helps to maintain the integrity of cells. Although vitamin E deficiency is rare, supplementation may provide some benefit to people with arthritis and certain types of nerve pain, as well as those with Alzheimer's disease. However, recent ConsumerLab tests found that some vitamin E do not contain the amount of vitamin E listed on their labels.

News Release

11/05/2021

NAD Boosters for Energy and Memory? ConsumerLab Reviews NAD+, NAHD and NMN Supplements

White Plains, New York, November 5, 2021 — Most cells in the body use NAD (nicotinamide adenine dinucleotide) in the process of energy production, and compounds that boost blood levels of NAD are often sold in supplements marketed for a wide range of benefits, from increasing energy and improving cognitive function, to lowering cholesterol and controlling blood sugar. But do supplements containing these compounds really work, and which provide the best quality and value? To find out, ConsumerLab carefully reviewed the evidence and purchased and tested popular NAD boosters containing NAD, NADH (nicotinamide adenine dinucleotide hydride), nicotinamide riboside (including Niagen), and NMN (nicotinamide mononucleotide), carefully checking them to see if they contained their claimed amounts of key ingredients. The products were also tested for contamination with lead, cadmium, and arsenic, and all regular tablets were also tested to determine if they would properly disintegrate.

News Release

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

Each year, ConsumerLab.com surveys its free e-newsletter subscribers about the vitamins and supplements that they use. The results below are based on 10,260 responses collected in November, 2011. Most respondents used multiple supplements. Respondents gave ratings for 1,551 brands and 906 merchants that they used. Ninety brands and 36 merchants each received at least one hundred consumer ratings. Among these popular brands and merchants, those receiving the highest rating on overall consumer satisfaction within their specific market segment are listed below.

News Release

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 

Each year, ConsumerLab.com surveys its free e-newsletter subscribers about the vitamins and supplements that they use. The results below are based on 6,010 responses collected in November, 2010. Most respondents used multiple supplements. Respondents gave ratings for 1,481 brands and 1,182 merchants that they used. Seventy brands and 33 merchants each received at least one hundred consumer ratings. Among these popular brands and merchants, those receiving the highest rating on overall consumer satisfaction within their specific market segment are listed below.

News Release

10/28/2008

Tests reveal quality problems with vitamin A supplements -- New ConsumerLab.com report focuses on vitamin A, including beta-carotene and cod liver oil

WHITE PLAINS, NEW YORK — OCTOBER 28, 2008 — ConsumerLab.com is cautioning that the amount vitamin A in some supplements may be much higher or lower than the amount stated on labels. Among ten supplements recently selected for testing, ConsumerLab.com discovered that one delivered nearly double its claimed amount of vitamin A — of concern due to potential toxicity -- and three others provided significantly less vitamin A than stated on the labels.

News Release

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.

WHITE PLAINS, NEW YORK — JANUARY 13, 2009 — A report by ConsumerLab.com on supplements containing the anti-oxidant CoQ10 shows the difficulty for consumers in determining an appropriate dosage. CoQ10 is among the most popular and fastest growing supplements in the US with $413 million sold in 2007, up over 8% from the prior year, according to figures from Nutrition Business Journal. An "activated" chemical form of CoQ10 known as "ubiquinol" is also now widely sold.

News Release

5/17/2017

Best Vitamin D? ConsumerLab.com Tests Popular Vitamin D Supplements and Reveals Its Top Picks

White Plains, New York, May 17, 2017 — Vitamin D is currently the most popular dietary supplement among people who regularly use supplements according to a recent survey by ConsumerLab.com. Its popularity is driven by the fact that having sufficient vitamin D in the body is associated not only with maintaining strong bones but a reduced risk of falls, heart attack, high blood pressure, depression, rheumatoid arthritis, asthma and even colds.

News Release

1/25/2006

Sexual enhancement supplements analyzed by Consumerlab.com

WESTCHESTER COUNTY, NEW YORK — JANUARY 25, 2006 — ConsumerLab.com announced today that it found only six out of eleven supplements used for sexual enhancement to contain key ingredients listed on their labels and meet other quality criteria. Products failed testing due to lead contamination or for containing lower levels of compounds than expected. The new Product Review of Sexual Enhancement Supplements also reviews the clinical evidence for 35 different herbs and ingredients used in such products. Of these thirty-five, moderate or preliminary evidence of benefit was found for only fourteen ingredients.

News Release

6/10/2015

ConsumerLab.com Tests Reveal Best and Worst Magnesium Supplements

White Plains, New York, June 10, 2015 — Magnesium supplements have become extremely popular, surpassing even calcium among frequent users of supplements. However, recent tests by ConsumerLab.com reveal that not all magnesium supplements contain what they claim -- and higher cost doesn't mean higher quality. In fact, some supplements that passed ConsumerLab.com's tests cost just a few cents per dose, while others costing twenty times as much failed. One widely promoted and relatively expensive product, for example, contained only 61.5% of its listed magnesium. Among the 18 products selected for review, three failed testing and fifteen were Approved for quality.

News Release

2/12/2014

Top-rated Vitamin and Supplement Brands and Merchants for 2014 Based on Consumer Satisfaction -- Results of the ConsumerLab.com Survey of Vitamin & Supplement Users

Each year, ConsumerLab.com surveys its free e-newsletter subscribers about the vitamins and supplements that they use. The results below are based on 10,326 responses collected in November, 2013. Respondents gave ratings for 1,639 brands and 788 merchants. Of these, 105 brands and 41 merchants each received at least 100 consumer ratings. Among these popular brands and merchants, those receiving the best (highest) rating on overall consumer satisfaction within their specific market segment are listed below. (See separate news release about the most popular types of supplements.)

News Release

5/15/2007

ConsumerLab.com finds some alpha lipoic acid supplements come up short — Improper formulation may cause ingredient degradation

WHITE PLAINS, NEW YORK — May 15, 2007 — ConsumerLab.com announced that two of eleven alpha lipoic acid supplements that it recently chose to test contained significantly less ingredient than promised on their labels. Alpha lipoic acid is a natural anti-oxidant that can help diabetics by reducing symptoms of peripheral neuropathy and other organ damage. It is an approved prescription drug in Germany for treating neuropathies, but is sold in the U.S. as a dietary supplement. It is commonly promoted as an "anti-aging" supplement due to preliminary studies in animals, although such effects have not been well established in people.

News Release

2/15/2007

ConsumerLab.com survey shows brands and merchants rated highest by dietary supplement users

CONSUMERLAB.COM SURVEY SHOWS BRANDS AND MERCHANTS RATED HIGHEST BY DIETARY SUPPLEMENT USERS

News Release

2/14/2007

ConsumerLab.com reports on anti-depressant herb — St. John's Wort — Few supplements pass quality testing

WHITE PLAINS, NEW YORK — FEBRUARY 14, 2007 — St. John's wort may be helpful in treating mild to moderate cases of clinical depression, but a new report from ConsumerLab.com shows that few of the herbal products tested met quality standards. Americans purchased $64 million of St. John's wort products in 2005 according the Nutrition Business Journal.

CL Answer

I use beta-sitosterol for my prostate. Should it be taken with or without food?

How should you take the prostate supplement beta-sitosterol to maximize absorption? Learn more at ConsumerLab.com.

How to Take Beta-Sitosterol -- man holding beta-sitosterol capsules

News Release

2/25/2016

Top-rated Vitamin and Supplement Brands and Merchants for 2016 Based on Consumer Satisfaction

Each year, ConsumerLab.com surveys its free e-newsletter subscribers about the vitamins and supplements that they use. The results below are based on 11,534 responses collected in November, 2015. Respondents gave ratings for 963 brands and 399 merchants. Of these, 108 brands and 44 merchants each received at least 100 consumer ratings. Among these popular brands and merchants, those receiving the best (highest) rating on overall consumer satisfaction within their specific market segment are listed below. [Update: see most recent results.]

News Release

9/13/2016

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

White Plains, New York, September 13, 2016 — Fish oil and omega-3 fatty acid supplements containing EPA and DHA are among the most popular supplements, and clinical studies suggest a wide range of potential benefits, from improving mental health to treating inflammatory disease. There is emerging evidence that omega-7s, another type of fatty acid found in fish, may have health benefits as well. However, it can be difficult to choose one which best suits an individual needs in terms of EPA/DHA ratio, dose, and form (such as ethyl ester vs. triglyceride), let alone know which actually contain what's listed on the label. To help, ConsumerLab.com purchased, tested, reviewed and compared 44 popular products --- including those for adults, children, and pets sold as capsules, tablets, liquids, and chews. Most were made from fish oil, but some were made from krill oil, algal oil, cod liver oil, calamari oil, green-lipped mussel oil or sea buckthorn oil.

News Release

3/17/2015

CoQ10 & Ubiquinol Supplements Vary in Quality, as Well as Dose, Absorption, and Price According to ConsumerLab.com

White Plains, New York, March 17, 2015 — Findings from a recent study by ConsumerLab.com highlights the difficulty consumers have in selecting a supplement containing the highly-popular anti-oxidant CoQ10 or its activated form, ubiquinol. ConsumerLab.com's tests revealed that, among 24 CoQ10 and ubiquinol products it recently selected for testing, two contained less CoQ10 than listed -- one of which provided only 61% of the amount claimed. Even among products which contained their listed ingredients, consumers need to choose carefully --- the suggested daily dose ranged from 30 mg to 1,000 mg and the calculated cost ranged from 8 cents to more than $3 to obtain an equivalent amount (100 mg) of CoQ10 from products. The results appear in a new online report showing which products passed or failed testing, offer the best value, and contain solubility-enhancers which may increase absorption.

News Release

4/28/2015

Best Supplements for Bone Health? ConsumerLab.com 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 ConsumerLab.com 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

3/25/2020

Trouble Sleeping? ConsumerLab Tests Reveal the Best Melatonin Supplements

White Plains, New York, March 25, 2020 — Melatonin supplements can help you fall asleep faster, and some may help you stay asleep. But with so many different ways to get melatonin, from capsules and tablets to liquids and gummies, and so many dosages available, which products provide the best quality and value?

News Release

11/01/2017

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

White Plains, New York, November 1, 2017 — Multivitamin/multimineral supplements are among the most popular supplements, with many consumers relying on them to provide nutrients they may not get from their diets. However, ConsumerLab.com found problems with 46% of the multivitamin supplements it recently selected for review. Problems were most common among gummy vitamins and large tablets. Among supplements that passed testing, ConsumerLab identified top choices for men, women, and children, as well as for pets, based on product quality, nutrient levels, safety, and cost.

News Release

10/31/2011

Supplements for lactose intolerance vary in strength and cost, and some offer no benefit, according to ConsumerLab.com

White Plains, New York — October 31, 2011 — Can lactose-free milks and lactase enzyme supplements provide help to the millions of Americans with lactose intolerance.? "Yes, but it depends on how much enzyme activity is in the supplement and how much lactose has been removed from the milk," says ConsumerLab.com President, Tod Cooperman, M.D. ConsumerLab.com recently selected and tested ten different lactase supplements and three popular lactose-free milks, including well-known brands like Lactaid and Dairy Ease. The testing showed no enzyme activity in one lactase supplement and another with so little activity as to be of questionable value. However, most of the lactase supplements provided levels of enzyme activity known to be beneficial. Each of the lactose-free milks passed testing, having no detectable lactose, although only two provided a significant amount of vitamin D. The new report was published online today for ConsumerLab.com members.

News Release

2/25/2015

Top-rated Vitamin and Supplement Brands and Merchants for 2015 Based on Consumer Satisfaction -- Results of the ConsumerLab.com Survey of Vitamin & Supplement Users

Each year, ConsumerLab.com surveys its free e-newsletter subscribers about the vitamins and supplements that they use. The results below are based on 10,329 responses collected in November, 2014. Respondents gave ratings for 1,709 brands and 891 merchants. Of these, 115 brands and 51 merchants each received at least 100 consumer ratings. Among these popular brands and merchants, those receiving the best (highest) rating on overall consumer satisfaction within their specific market segment are listed below.

News Release

4/09/2014

Best Fish Oil? ConsumerLab.com Testing Finds Many High Quality Supplements, But Pitfalls Exist

White Plains, New York, August 10, 2014 — Recent laboratory tests of fish oil, krill oil, algal oil, calamari oil, and green-lipped mussel oil supplements by ConsumerLab.com revealed quality problems with four out of 30 supplements selected for review. Three supplements, including two for children, lacked more than 10% of their listed amounts of the omega-3 fatty acids EPA and/or DHA. Another product failed to list the ingredients in its enteric coating. ConsumerLab.com also found that a widely promoted "Omega" supplement actually contained only tiny amounts of EPA and DHA.

News Release

5/21/2014

Your Cocoa May Be Contaminated! ConsumerLab.com Reveals What’s Really in Cocoa and Chocolate Products

White Plains, New York, May 21, 2014 [See related new release on 8/5/14] — Cocoa powders, dark chocolates, and other products made from cacao beans can be rich in flavanols -- which may help with blood flow, blood pressure, and cholesterol levels. However, they may also be contaminated with the toxic heavy metal cadmium, according to recent tests from the independent testing group, ConsumerLab.com.

News Release

10/17/2012

ConsumerLab.com Tests and Compares Vision Supplements - Guides Consumers Through a Variety of Ingredients and Formulas

White Plains, New York — October 17, 2012 — Can a supplement improve your vision or prevent it from deteriorating? "The evidence shows that some supplements may help improve vision in people with macular degeneration and others can slow its progression," says Tod Cooperman, M.D., President of ConsumerLab.com. "The problem for a consumer is knowing if he or she should be taking a vision supplement and, if so, which one contains the correct dosage and combination of ingredients -- and at the best price." ConsumerLab.com's recent Product Review of Vision Supplements with Lutein and Zeaxanthin addresses these questions.

News Release

2/01/2013

Top-rated Vitamin and Supplement Brands and Merchants for 2013 Based on Consumer Satisfaction

Each year, ConsumerLab.com surveys its free e-newsletter subscribers about the vitamins and supplements that they use. The results below are based on 10,862 responses collected in November, 2012. Respondents gave ratings for 1,438 brands and 851 merchants. Of these, 91 brands and 40 merchants each received at least 100 consumer ratings. Among these popular brands and merchants, those receiving the best (highest) rating on overall consumer satisfaction within their specific market segment are listed below. (See separate news release about the most popular types of supplements.

News Release

3/05/2013

CoQ10 & Ubiquinol Supplements Should Be Chosen Carefully, Cautions ConsumerLab.com -- Less Than 4% of Listed Ingredient Found in Widely-Sold Product

White Plains, New York — March 5, 2013 — A new report from ConsumerLab.com highlights the difficulty consumers have in selecting a supplement containing the anti-oxidant CoQ10 or its activated form, ubiquinol. ConsumerLab.com's recent tests found that one widely-sold supplement provides only 3.8% of its listed amount of CoQ10. Even among products found to contain their listed ingredients, consumers should choose carefully: ConsumerLab.com found the cost of a 100 mg dose of CoQ10 to range from 9 cents to several dollars. Some products include additional ingredients, such as those which may improve absorption of CoQ10 and ubiquinol, but may not necessarily justify a higher cost.

News Release

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

WHITE PLAINS, NEW YORK — MARCH 8, 2011 — A new report by ConsumerLab.com highlights the difficulty consumers may have in selecting a supplement containing the anti-oxidant CoQ10 or its activated form, ubiquinol. CoQ10 is among the most popular dietary supplements in the U.S. with $450 million sold in 2009, according to Nutrition Business Journal. The recent Supplement Users Survey by ConsumerLab.com showed that 53.3% of serious supplement users purchased CoQ10 in 2010 and this rate was even higher among men and people over the age of fifty-five.

News Release

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

WHITE PLAINS, NEW YORK — FEBRUARY 1, 2011 — Among people who use dietary supplements, the most popular products at the end of 2010 were fish oil, multivitamins, vitamin D, calcium and CoQ10 according to a survey by ConsumerLab.com. Use of vitamin D surged in 2010 to 56.2% of those surveyed, up from 47.9% in 2009 and 36.9% in 2008 — a 52% increase over the two-year period. The ConsumerLab.com survey is conducted each November and is based on more than 6,000 responses from a sampling of subscribers to the ConsumerLab.com free e-newsletter. Most respondents in the survey use multiple supplements.

News Release

2/26/2014

Mislabeling of Some Joint Health Supplements with Glucosamine, Chondroitin, Boswellia, and MSM According to ConsumerLab.com -- 38 Supplements Tested, Including Products for Dogs and Cats --

White Plains, New York, February 26, 2014 — Glucosamine, chondroitin, Boswellia, and MSM are popular dietary supplement ingredients for treating symptoms of osteoarthritis — worn joint cartilage. But some products don't contain listed ingredients, are contaminated with lead, or do not break apart properly, according recent analyses by ConsumerLab.com. In fact, 17% of 18 supplements for people selected for review failed testing, as did all four of the products for dogs and cats. Additional products which passed testing, including two for pets, were identified through ConsumerLab.com's Quality Certification Program.

News Release

9/28/2010

ConsumerLab.com finds quality problems with nearly 30% of fish oil supplements reviewed; "Fishy" claims identified -- Softgels and liquids for adults, children and pets tested, including krill oil and algal oil supplements 

White Plains, New York — September 28, 2010 — Tests of fish, algal and krill oil supplements revealed quality problems with 7 out of 24 products selected by independent testing organization ConsumerLab.com. Three products contained less of the omega-3 fatty acids EPA and/or DHA than claimed, spoilage was detected in one of these products as well as in two others (including a children's supplement), an enteric-coated product released its ingredients too early, and a supplement for pets exceeded the contamination limit for PCBs. Seventeen other products passed testing as did 15 products similarly tested through ConsumerLab.com's voluntary certification program. ConsumerLab.com's report is now available online to its members.

News Release

10/26/2010

ConsumerLab.com reports deficiencies in some B-complex supplements and more caffeine than expected in "shot-sized" B vitamin "energy" drinks

White Plains, New York — October 26, 2010 — Tests of B vitamin supplements, including B-complexes and shot-sized energy drinks, revealed problems with the quality of 4 out of 18 products selected for review by independent testing organization ConsumerLab.com. One widely-sold B-complex supplement was found to contain only 17.9% of its vitamin B-12. Another had no detectable vitamin B-6 and was short on both biotin and folic acid. Two energy shot liquid supplements were low on folic acid, respectively providing only 40.4% and 75.5% of the amounts listed on their labels.

News Release

2/23/2017

ConsumerLab.com Reveals Best and Worst B Vitamin Supplements and Why Current Labels Often Mislead

White Plains, New York, February 24, 2017 — B vitamins and complexes are popular supplements, but labels often mislead, says a new report from ConsumerLab.com which tested, reviewed, and compared 49 supplements from the U.S. and Canada containing B complexes, B6, B12, biotin, folate, niacin, thiamin, and/or riboflavin. B vitamins are of benefit to people not able to get enough of these essential nutrients from their diets, such as many older people, those taking medicine to lower stomach acid, pregnant women and individuals with certain genetic variants.

News Release

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

White Plains, New York, February 25, 2020 — Each year, ConsumerLab.com surveys its free e-newsletter subscribers about the vitamins and supplements that they use. The results below are based on 9,782 responses collected in late November and early December 2019. Respondents gave ratings of hundreds of brands and merchants of which 137 brands and 39 merchants each received at least 90 consumer ratings. Among these popular brands and merchants, those receiving the highest rating on overall consumer satisfaction within their specific market segment are listed below.

CL Answer

I recently read that turmeric is only effective if it is combined with black pepper. Is this true?

Find out the best way to take turmeric and curcumin supplements to increase absorption and bioavailability. ConsumerLab.com's answer explains.

Is Turmeric Only Effective with Black Pepper? -- Turmeric Supplement and Black Pepper

News Release

8/05/2014

ConsumerLab.com Finds Popular Cocoa Powders Contaminated; High Concentrations of Cadmium Raise Concern

White Plains, New York, August 5, 2014 — Following up on its discovery in May of high levels of the toxic metal cadmium in several cocoa-based products, ConsumerLab.com recently tested additional, popular cocoa products sold in the U.S. to assess the extent of the problem. The independent testing company now reports the problem is widespread among cocoa powders, involving nearly every brand of cocoa powder tested.

News Release

2/06/2006

ConsumerLab.com finds most prostate supplements have correct ingredients, but three fail testing — Results posted for 22 supplements containing saw palmetto and beta-sitosterol

WESTCHESTER COUNTY, NEW YORK — FEBRUARY 6, 2006 — ConsumerLab.com announced test results today from its new Product Review of Prostate Supplements. Year after year, saw palmetto remains one of the most popular herbal supplements due to its ability to improve urinary symptoms in men with prostate enlargement. ConsumerLab.com's testing found nineteen supplements to provide the proper amount and quality of saw palmetto or beta-sitosterol known to improve symptoms; three saw palmetto products did not, including two major brands.

News Release

2/25/2017

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

White Plains, New York, February 25, 2017 — Each year, ConsumerLab.com surveys its free e-newsletter subscribers about the vitamins and supplements that they use. The results below are based on 9,505 responses collected in late November and early December 2016. Respondents gave ratings for 155 brands and 99 merchants. Of these, 106 brands and 38 merchants each received at least 95 consumer ratings. Among these popular brands and merchants, those receiving the highest rating on overall consumer satisfaction within their specific market segment are listed below. [Update: see most recent results.]

News Release

7/19/2017

New Tests Reveal Whether Dark Chocolates and Cocoas Are Toxic or Healthful

White Plains, New York, July 19, 2017 — Dark chocolates and cocoa may contain dangerously high levels of the heavy metal cadmium, a kidney toxin, according to recent tests conducted by ConsumerLab.com, an independent evaluator of health and nutrition products. Often consumed for their beneficial cocoa flavanols, which ConsumerLab also measured, chocolate and cocoa products ranged from virtually zero flavanols to levels that may provide cardiovascular and cognitive benefits. The challenge is knowing which products provide potential benefits from flavanols with minimal risk from heavy metal contamination. Labels don't provide this information, but CL's findings do.

News Release

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

White Plains, New York, February 25, 2019 — Each year, ConsumerLab.com surveys its free e-newsletter subscribers about the vitamins and supplements that they use. The results below are based on 10,931 responses collected in late November and early December 2018. Respondents gave ratings of hundreds of brands and merchants of which 145 brands and 45 merchants each received at least 90 consumer ratings. Among these popular brands and merchants, those receiving the highest rating on overall consumer satisfaction within their specific market segment are listed below.

News Release

2/25/2018

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

White Plains, New York, February 25, 2018 — Each year, ConsumerLab.com surveys its free e-newsletter subscribers about the vitamins and supplements that they use. The results below are based on 11,446 responses collected in late November and early December 2017. Respondents gave ratings of hundreds of brands and merchants of which 141 brands and 48 merchants each received at least 90 consumer ratings. Among these popular brands and merchants, those receiving the highest rating on overall consumer satisfaction within their specific market segment are listed below.

News Release

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

WHITE PLAINS, NEW YORK — JULY 10, 2009 — Nine supplements for osteoarthritis that ConsumerLab.com recently selected for testing were found to be contaminated with lead, lack all or some of a key ingredient or have other quality problems. The findings were confirmed in a second independent laboratory. The supplements tested included those for people as well as for veterinary use. Many other products passed ConsumerLab.com's tests, which focused on joint health supplements containing glucosamine, chondroitin, and/or MSM.

News Release

5/08/2012

Lead Contamination and Mislabeling in Joint Health Supplements with Glucosamine, Chondroitin, and MSM According to ConsumerLab.com

White Plains, New York, May 8, 2012 — Glucosamine, chondroitin, and MSM are popular dietary supplements for treating symptoms of osteoarthritis — worn joint cartilage. But some products are contaminated with lead, don't contain listed ingredients, or have inadequate labeling, according recent analyses by ConsumerLab.com. ConsumerLab.com purchased and tested supplements for osteoarthritis for people as well as products for dogs, cats and horses.

News Release

8/22/2012

Contamination and Other Problems Found in Fish Oil Supplements -- Large Review by ConsumerLab.com Reveals Excessive PCBs or Mislabeling in Over 30% of Omega-3 Supplements

August 22, 2012 — The quality of fish oil / omega-3 supplements varies across brands, according to recent tests by ConsumerLab.com, which independently reports on the quality of health products. Analyses of 35 products selected and purchased by ConsumerLab.com showed problems with the quality or labeling of 11, or 31.4%, of the products. ConsumerLab.com uncovered the following problems:

  • Trace levels of PCBs were found in every product (as PCBs are ubiquitous in water), but two supplements exceeded contaminations limits for PCBs. Mercury was not detected in any of the products. (While it is best to avoid supplements with excess contaminants, raw or cooked fish may contain far more PCBs, as well as mercury, than fish oil supplements.)
  • Four supplements (including one of the contaminated products) contained 20% to 30% less than the claimed amounts of EPA, DHA or other omega-3 fatty acids.
  • An enteric-coated softgel (intended to reduce "fish burp") released its fish oil too early.
  • One softgel product contained spoiled fish oil.
  • Three products contained two to three times the claimed amounts of EPA or other fatty acids, and one supplement incorrectly claimed to contain 1 mg of fat but contained 1,000 mg (1 gram) of fat.

News Release

2/25/2022

Top-rated Vitamin and Supplement Brands and Merchants for 2022 Based on Consumer Satisfaction

White Plains, New York, February 25, 2022 — Each year, ConsumerLab.com surveys its free e-newsletter subscribers about the vitamins and supplements that they use. The results below are based on 8,049 responses collected in November/December 2021. Respondents gave ratings of hundreds of brands and merchants of which 143 brands and 35 merchants each received at least 90 consumer ratings. Among these popular brands and merchants, those receiving the highest rating on overall consumer satisfaction within their specific market segment are listed below.

News Release

4/13/2022

ConsumerLab Tests Vitamin D Supplements and Cautions About Dose

  White Plains, New York, May 12, 2022 — Getting sufficient vitamin D is essential for healthy bones and has a wide range of other health benefits. It's no wonder that it has been the #1 supplement in popularity year-after-year in ConsumerLab's survey of supplement users. However, getting too much vitamin D can have adverse effects. With so many different vitamin D supplements on the market, how can consumers know which products provide the best dose of vitamin D to meet their needs at the best quality and cost?

News Release

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

White Plains, New York, February 25, 2021 — Each year, ConsumerLab.com surveys its free e-newsletter subscribers about the vitamins and supplements that they use. The results below are based on 9,647 responses collected in November 2020. Respondents gave ratings of hundreds of brands and merchants of which 149 brands and 38 merchants each received at least 90 consumer ratings. Among these popular brands and merchants, those receiving the highest rating on overall consumer satisfaction within their specific market segment are listed below.

CL Answer

Which is the best form of magnesium to take - one that contains the most magnesium and is best absorbed?

Info on which is the best form of magnesium supplements to take and what to look for when choosing the best magnesium supplement. ConsumerLab.com explains.

CL Answer

Which supplements make acid reflux worse? I take many and think some are causing heartburn. Are there any supplements that help treat acid reflux?

Find out which supplements can cause or worsen acid reflux, nausea and GERD, including vitamin B6, arginine, and CoQ10.

Supplements Making Acid Reflux Worse -- Man with acid reflux pain

CL Answer

Which supplements are best for seasonal allergies?

Find out which supplements are best for allergies and can help reduce seasonal allergy symptoms, including bromelain, curcumin, vitamin D, and CLA.

Supplements for Seasonal Allergies -- Woman Outside Sneezing