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31% of Turmeric/Curcumin Products Fail CL's Tests
How to Choose the Best Turmeric & Curcumin

What's Really In Green Tea?
See Our Top Picks for Green Tea Supplements, Teas, and Drinks

41 Probiotic Supplements and DrinksTested
41 Probiotic Supplements and Drinks Tested

Some Chromium Supplements Contain More Than You Want
Some Chromium Supplements Contain More Than You Want

Choose the Best L-Tryptophan and 5-HTP Supplements
CL Identifies High Quality L-Tryptophan Supplements and 5-HTP at the Best Value

See the Test Results for Ashwagandha!
See the Test Results for Ashwagandha!

Tests of Valerian Supplements -- Two Fail for Lead
Valerian "Sleep" Supplements Vary in Key Compounds

Find the Best Bone Broth with the Most Collagen
Tests Show You Can't Always Rely on Labels

Find the Best Apple Cider Vinegar and Avoid Problems
Some Can Be Poison

Problems with 46% of Multivitamins - Particularly Gummies
New Findings for Women's, Men's, Children's & Pets' Multis

The Best Melatonin Supplements and How to Use Them
See Our Product Tests and Expert Tips

Find Out Which Ginkgo Is Best
Many Fail ConsumerLab's Tests of Quality

Best Fish Oil? See Our New Tests and Comparisons
How to Get the Right Omega-3s from Fish, Krill & Other Oil Supplements

The Best Iron Supplements Identified by ConsumerLab
How to Get Iron from the Best Iron Supplements

Best and Worst Quality Magnesium Supplements Identified
Avoid Magnesium Supplements With Problems

Choose Berberine and Goldenseal Carefully -- Avoid Fakes
Berberine and Goldenseal - Do They Work? Best Brand?

Omega-3 and Omega-6 Oils Tested
Is Your Oil Supplement Fresh? Flaxseed, Hemp and More

Be Sure You're Avoiding Problems with Vitamin D
Find the Best Vitamin D Supplement

Zinc Lozenges and Supplements? See CL's Top Picks
Zinc Lozenges and Supplements? See CL's Top Picks

Is Your Dark Chocolate or Cocoa Healthful or Toxic?
Find Out What's Really in Your Dark Chocolate and Cocoa

Find the Best Lithium Supplement Based on Independent Tests
Find the Best Lithium Supplement Based on Independent Tests

Find the Best Creatine and BCAA Supplements for Muscle
Avoid Pitfalls with Muscle Supplements

L-Arginine Supplements Pass Quality Review But Dosage of Some May Not Be Effective for Expected Use
L-Arginine - Does it Work? Best Brand?

Find Out Which Calcium Rated Best and If You Need It
Check the Quality of Calcium Supplements

Find the Best Vitamin K Supplement for You, Now!
Find the Best Vitamin K Supplement for You, Now!

Best and Worst B Vitamins Revealed
Many B Vitamin Labels Found To Be Misleading

20% of Vitamin C Supplements Fail Testing
Learn How To Choose and Best Use Vitamin C

Half of Kelp Supplements May Not Be Safe
Caution with Kelp Supplements!

Find Out Which Extra Virgin Olive Oils Rated Best
Some "Extra Virgin" Olive Oils May Not Be

Find Out Which Choline is Rated Best
Find Out Which Choline is Rated Best

Choose the Best CoQ10 & Ubiquinol
CoQ10 and Ubiquinol Differ in Quality, Absorption & Cost

Find the Best Lipoic Acid Supplement at the Right Price
Alpha-Lipoic Supplements Found to Range 1,000% in Cost!

Choose Aloe Pills, Gels, and Drinks Carefully!
Choose Aloe Pills, Gels, and Drinks Carefully!

Tests and Comparisons of Potassium Supplements
Tests and Comparisons of Potassium Supplements

Find Out How to Get Top Quality Astaxanthin at Lower Cost
Find Out How to Get Top Quality Astaxanthin at Lower Cost

Resveratrol: Worth Taking? Best Supplements?
19 Resveratrol Supplements Reviewed

See Our Results for Steel-Cut, Rolled, O's, and Other Oat Cereals
See Our Results for Steel-Cut, Rolled, O's, and Other Oat Cereals

Only 40% of St. John's Wort Supplements Pass Tests
20,000% Difference in Strength of Herbal Antidepressants

Several Greens/Whole Food Products Fail Tests
Several Greens/Whole Food Products Fail Tests

What We Found With Nattokinase Supplements May Suprise You
Nattokinase: Does It Work and Which Supplements Are Best?

Find a CL Approved Supplement with Glucosamine, Chondroitin, MSM, or Boswellia
Some Problems Among Supplements for Joint Pain

Meal Replacement Products Tested and Compared
Meal Replacement Products Tested and Compared

Popular Protein Powders, Shakes and Drinks Reviewed
Popular Protein Powders, Shakes and Drinks Reviewed

Tests Show Large Difference Among Ginger Supplements and Ales
Get the Right Ginger

Most Milk Thistle/Liver Formula Products Low in Key Component
Most Milk Thistle/Liver Formula Products Low in Key Component

Many Failures Among Supplements for Joint Disease in Dogs and Cats
Choose Joint Supplements for Pets Carefully!

Learn About Rhodiola and Our Top Picks
Learn About Rhodiola and Our Top Picks

Get the Most Cocoa Flavanols with the Least Contamination
What's Really in Your Cocoa and Dark Chocolate?

Tests of Echinacea Pills and Liquids
Tests of Echinacea Pills and Liquids

Does Lysine Work for Cold Sores? Which Product Are Best?
Does Lysine Work for Cold Sores? Which Product Are Best?

SAM-e for Osteoarthritis and Depression Tested
SAM-e for Osteoarthritis and Depression Tested

Major Differences Discovered Among Cinnamon Supplements and Spices
Be Careful Choosing Cinnamon

Lutein, Zeaxanthin and Vision Formulas Vary Widely
Which Vision Supplement Is Right for You?

43 Probiotic Supplements and Kefirs Tested
43 Probiotic Supplements and Kefirs Tested

Check the Strength and Purity of Green Tea Supplements, Teas, and Drinks
What's Really In Green Tea? (Including Matcha!)

Find a CL Approved Supplement That May Help with Prostate Symptoms
Find a CL Approved Supplement That May Help with Prostate Symptoms

Get the Scoop on Vitamin E and Product Ratings & Comparisons
Get the Scoop on Vitamin E and Product Ratings & Comparisons

Learn About L-Theanine and the Differences in Supplements
Learn About L-Theanine and the Differences in Supplements

Learn Which Maca Supplements Passed or Failed CL Testing and the Evidence Behind Maca
Tests of Maca -- Popular for Stamina / Sexual Enhancement

Find Out Which Soy Isoflavone, Red Clover, Black Cohosh, or Progesterone Products Have What You Want!
Tests Reveal What's Really In Menopause Supplements

Use and Choose DHEA Supplements Carefully!
Use and Choose DHEA Supplements Carefully!

Avoid Magnesium Supplements Delivering Wrong Amounts!
Best and Worst Quality Magnesium Supplements Identified.

Find the Best Melatonin for Sleep and Other Uses!
Melatonin Sleep Supplements Tested and Reviewed

Some Enzyme Labels Won't Tell You, But We Do
Some Enzyme Labels Won't Tell You, But We Do

CoQ10 and Ubiquinol Differ in Quality, Absorption & Cost
Choose the Best CoQ10 & Ubiquinol -- and Save Money

Cod Liver Oil, Beta-carotene, Other Vitamin A Supplements Reviewed
Be Careful with Vitamin A Supplement Dosage!

Learn More About Garlic and Find the Best Supplements
Learn More About Garlic and Find the Best Supplements

Learn When and How to Use Iron Supplements
Are You Getting Enough Iron and The Best Quality Supplement?

Find the Best NAC Supplements at Lowest Cost
N-Acetyl Cysteine (NAC) Supplements Tested

What's in Red Yeast Rice Supplements? Labels Won't Tell, But We Will
Some Red Yeast Rice 500X Stronger Than Others!

Some Supplements Can Help Lower Cholesterol and Reduce the Risk of Heart Disease
Some Supplements Can Help Lower Cholesterol and Reduce the Risk of Heart Disease

Less CLA Than Expected in Some Products
Less CLA Than Expected in Some Products

See Results for Herbal Blends and 7-Keto DHEA Weight Loss Supplements
See Results for Herbal Blends and 7-Keto DHEA Weight Loss Supplements

Most Garcinia (HCA) Supplements Fail CL's Tests
Garcinia Weight Loss Supplements Found Lacking

Tests and Comparisons of Korean, Chinese & American Ginseng
Tests and Comparisons of Korean, Chinese & American Ginseng

Tests of Valerian Supplements -- Two Fail for Lead
Valerian "Sleep" Supplements Vary in Key Compounds

See Our Picks for Protein, Energy, Fiber & Whole Food Bars
How Does Your Nutrition Bar Stack Up?

20 Resveratrol Supplements Tested
What's Really in Resveratrol Supplements?

Test Results and Comparisons of Potassium Supplements
Don't Be Confused by Potassium Supplements

Watch Out for Fake Bilberry Supplements
Watch Out for Fake Bilberry Supplements

Lycopene Supplements Vary in Quality and Price
Lycopene Supplements Vary in Quality and Price

50% of Green Coffee Supplements Lack Expected Ingredients for Weight Loss
50% of Green Coffee Supplements Lack Expected Ingredients for Weight Loss

Check Your Selenium Supplement in Our Report
Check Your Selenium Supplement in Our Report

Huperzine A Supplements -- Potential Help for Alzheimer's Disease
Find Out Which Huperzine A Supplements Are CL Approved

Acetyl-L-Carnitine Supplements Tested
Quality is High, But So Are Prices -- We Found the Best Value

Lactose Intolerance Products Found to Vary in Strength and Cost
Can Lactose-Free Milk and Supplements Help with Intolerance?

They're Popular in the Gym, But Can Nitric Oxide Supplements Help You?
Do Nitric Oxide Supplements Work?

Only 30% of Selected Sexual Enhancement Supplements Pass Quality Tests
Only 30% of Selected Sexual Enhancement Supplements Pass Quality Tests

L-Tryptophan Supplements are Back -- But Are They Safe? Do They Work?

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