Independent Tests and Reviews of Vitamin, Mineral, and Herbal Supplements

Brita Lawsuit Dismissed

A class-action lawsuit alleging that Brita did not live up to its claims of removing contaminants has been dismissed. Find out why and get our take on this in our Water Filter Pitchers Review + our Top Picks for water filter pitchers.

New Cocoa High-Flavanol Supplement Top Pick

A high-flavanol cocoa powder just earned Top Pick in our tests.

Get the details in our Dark Chocolate & Cocoa Review, which now covers 27 products.

Oregano Oil Supplements: Choose Carefully

Testing of 35 popular oregano oil supplements sold on Amazon found that half contained far less than expected, or none, of a key oregano compound. Get the details, by product name, in the Oregano Oil section of our article about supplements for peptic ulcers.

Important Changes Affecting Thyroid Medications

The FDA has reaffirmed its position that thyroid extracts, such as NP Thyroid and Armour Thyroid, will need to be approved to stay on the market. Insurance coverage changes may be coming soon. Get the full update in our article about Supplements for Thyroid Health.

GLP 1 With B-12?

A recent study raises red flags about compounded tirzepatide (the GLP-1 agonist in Zepbound and Mounjaro) mixed with vitamin B-12. Learn more in our article about supplements to take or avoid with GLP-1s and whether GLP-1s affect vitamin D levels.

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Hemp Seeds
Reishi Supplements
Creatine Supplements
Omega-3 Fish Oil Supplements
Chia Seeds
Low-Carb & "Keto" Breads

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

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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Popular Product Reviews

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Water Filter Pitchers

Product Updates

Brita Lawsuit Dismissed

New Cocoa High-Flavanol Supplement Top Pick

Oregano Oil Supplements: Choose Carefully

Important Changes Affecting Thyroid Medications

GLP 1 With B-12?

Upcoming Reviews

Expert Answers to Popular Questions

Resistant Starch: Health Benefits & Safety

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

Which foods and supplements contain lead, cadmium, or arsenic?

Supplements and Foods to Lower Cholesterol?

Best Toothpaste for Cavity Prevention, Sensitivity, or Bleeding Gums?

Ratings of ConsumerLab

Clinical Updates

Choline in Multis – Should You Be Worried?

Sea Buckthorn for Dry Eye?

KilgourMD for Hair – Does It Work?

Kidney Damage from Creatine?

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Recalls & Warnings

Ghirardelli Cocoa, Hot Chocolate and Beverage Mixes Recalled Due to Salmonella Risk

FDA Warns Consumers Not to Use Certain Pain Relief Supplements

Lundberg Organic Jasmine White Rice Recalled

Good Brain Tonic Recalled

Bari Life, Bird&Be, Dr. Fuhrman & Other Multis Recalled

Clinical Updates