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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

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Product Updates

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A Calcium Warning for GLP-1 Users

A recent case highlights a potentially serious interaction. See what to avoid and what to consider instead. Get the details in our article about supplements to take or avoid with GLP-1s.

Protein Powder Concern

A concerning amount of cadmium was reported in a chocolate protein powder. Learn more in our Protein Powders & Shakes Review + see our Top Picks among protein powders and shakes.

Liver Warning for Turmeric

A proposed label warning could change how turmeric supplements are viewed — and used. Get the details in our Turmeric and Curcumin Supplements Review, which includes Top Picks among supplements and turmeric spices.

Misleading Magnesium

A popular brand of magnesium supplements agreed to stop suggesting that its product provides 9 times as much magnesium as it actually does. Get the details in our Magnesium Supplements Review, which includes tips to avoid getting tricked and our Top Picks for magnesium.

Ashwagandha Concern

The government of India reiterated its ban on ashwagandha products, including ashwagandha leaf (which is in many U.S. products). Learn why in our Ashwagandha Supplements Review.