Find the best supplements and foods — based on independent tests of quality.

See Our Omega-3 Top Picks and Avoid Rancid Fish Oil

Our Tests Reveal Which Astaxanthin Supplements Offer Most Value

We Found the Best Quality Chia -- Avoid Mold and Metals

See Which Creatine Provides High Quality at Lowest Cost

Little to No Mushroom Found in Some Reishi Supplements

Best Hemp Seeds? We Found 33% of Products Were Spoiled.

Find Out Which Protein Products Passed or Failed Our Tests

Choose the Best NAC Supplement and Save Money

Find the Best Apple Cider Vinegar and Avoid Fakes

32% Failed our Tests. Choose Your Multivitamin Carefully.

High-Flavanol Cocoas Tested & Compared

Many Dark Chocolates and Cocoa Powders Fail Safety Tests

Beware of Differences in Dose and Price

Only 2 of 7 Red Yeast Rice Supplements Approved in CL Tests

What’s In Your Licorice? Find Out and Avoid Problems.

Find the Best Beetroot With the Most Nitrate

Only 5 of 8 Nattokinase Supplements Pass Tests

Learn Which Cinnamon to Choose or Avoid

See Our Top Picks Among Turmeric Products

3,700% Difference in Milk Thistle Supplements

See What’s Really in Probiotics and Our Top Picks

Our Tests Showed What’s Hiding in Protein Bars

Only 3 of 8 Amla Powders and Pills Pass CL's Tests

Discover Arsenic Levels in Rice and Our Top Picks

Find Fish Low in Mercury & Arsenic, High in Omega-3s

Pet Joint Supplements: See Our Top Picks

Find the Best Manuka Honey Based on our Tests

Avoid Overpaying for Glycine Supplements

4 out 10 Bone Broths Fail Our Tests

"Loose" Teas Added to Green Tea Review. See How They Compare.

See our Top Picks for L-Glutamine Based on Quality and Value

Inaccurate Labeling Discovered on Most Nutritional Yeasts

18% of Joint Health Supplements Failed to Pass Our Tests

Choose the Best Flaxseed and Other Oils Based On Our Tests

Black Seed Oil: Only 5 of 7 Approved

Find the Best Zinc Supplements, Including Lozenges for Colds

Find the Best Rolled and Steel-Cut Oats -- Beware of Unexpected Gluten

31% of Gluten-Free Grains Fail Our Tests Due to Contaminants

B Vitamins: See Our Top Picks and Which 5 Failed Testing

We Discovered Major Differences Among Shilajit Supplements

D-Mannose for UTIs? See Our Review.

High Levels of Toxin Found in Most Sunflower Seeds and Butters

Trouble Sleeping? See Our Review of Melatonin Supplements.

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"Fishy" Creatine

A CL member reported a "fishy" odor when opening a creatine product. We looked into this. See our Creatine Review, which includes our Top Picks for creatine.

Korean Sunscreens That Fall Short

Tests of Korean sunscreens made for the U.S. market show that some provide much less sun protection than listed—and less than similar products sold in Korea. Learn more in our safe and effective sunscreens article, including our picks for broad-spectrum sunscreens.

Magnesium Refund

A major supplement brand is paying over $1.8 million to settle claims that its magnesium supplement contained far less magnesium than listed. See the full story in our Magnesium Supplements Review + see our Top Picks for magnesium.

Cheaper Oils in Olive Oil

Several brands of olive oil were found to contain canola, pomace, or soybean oil -- with some containing no olive oil at all, according to recently filed lawsuits. Get the brand-by-brand details in our Extra Virgin Olive Oil Review + see our Top Picks for extra virgin olive oil.

Fake Urolithin A

Nineteen companies have been banned from making or selling urolithin A supplements in the U.S. Find out why in our article about urolithin A.

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Extra Virgin Olive Oils
Low-Carb & "Keto" Breads
Low-Dose Lithium Supplements
NAD Boosters (NMN, NAD+/NADH, and Nicotinamide Riboside Supplements)

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Supplements to Take (or Avoid!) With GLP-1 Drugs

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Become a CL member today to join over 100,000 members and access 1,400+ product reviews

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Find the best supplements and foods — based on independent tests of quality.

See Our Omega-3 Top Picks and Avoid Rancid Fish Oil

Our Tests Reveal Which Astaxanthin Supplements Offer Most Value

We Found the Best Quality Chia -- Avoid Mold and Metals

See Which Creatine Provides High Quality at Lowest Cost

Little to No Mushroom Found in Some Reishi Supplements

Best Hemp Seeds? We Found 33% of Products Were Spoiled.

Find Out Which Protein Products Passed or Failed Our Tests

Choose the Best NAC Supplement and Save Money

Find the Best Apple Cider Vinegar and Avoid Fakes

32% Failed our Tests. Choose Your Multivitamin Carefully.

High-Flavanol Cocoas Tested & Compared

Many Dark Chocolates and Cocoa Powders Fail Safety Tests

Beware of Differences in Dose and Price

Only 2 of 7 Red Yeast Rice Supplements Approved in CL Tests

What’s In Your Licorice? Find Out and Avoid Problems.

Find the Best Beetroot With the Most Nitrate

Only 5 of 8 Nattokinase Supplements Pass Tests

Learn Which Cinnamon to Choose or Avoid

See Our Top Picks Among Turmeric Products

3,700% Difference in Milk Thistle Supplements

See What’s Really in Probiotics and Our Top Picks

Our Tests Showed What’s Hiding in Protein Bars

Only 3 of 8 Amla Powders and Pills Pass CL's Tests

Discover Arsenic Levels in Rice and Our Top Picks

Find Fish Low in Mercury & Arsenic, High in Omega-3s

Pet Joint Supplements: See Our Top Picks

Find the Best Manuka Honey Based on our Tests

Avoid Overpaying for Glycine Supplements

4 out 10 Bone Broths Fail Our Tests

"Loose" Teas Added to Green Tea Review. See How They Compare.

See our Top Picks for L-Glutamine Based on Quality and Value

Inaccurate Labeling Discovered on Most Nutritional Yeasts

18% of Joint Health Supplements Failed to Pass Our Tests

Choose the Best Flaxseed and Other Oils Based On Our Tests

Black Seed Oil: Only 5 of 7 Approved

Find the Best Zinc Supplements, Including Lozenges for Colds

Find the Best Rolled and Steel-Cut Oats -- Beware of Unexpected Gluten

31% of Gluten-Free Grains Fail Our Tests Due to Contaminants

B Vitamins: See Our Top Picks and Which 5 Failed Testing

We Discovered Major Differences Among Shilajit Supplements

D-Mannose for UTIs? See Our Review.

High Levels of Toxin Found in Most Sunflower Seeds and Butters

Trouble Sleeping? See Our Review of Melatonin Supplements.

How to Avoid Fake Vitamins & Supplements Online

Join over 100,000 members and access 1,400+ product reviews

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B Vitamin Supplements

CoQ10 and Ubiquinol Supplements

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Multivitamin and Multimineral Supplements

Protein Powders

Psyllium Fiber Supplements

Vitamin D Supplements

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"Fishy" Creatine

Korean Sunscreens That Fall Short

Magnesium Refund

Cheaper Oils in Olive Oil

Fake Urolithin A

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