Showing Results for GNC

Alpha Lipoic Acid Supplements Review

Choose the Best Alpha-Lipoic Acid Supplement — See the Amounts of Active "R-Isomer" We Found

Magnesium Supplements Review

Find Out What Magnesium Does, Who Needs It, and Our Top Picks Among Supplements

Vitamin A Supplements Review, Including Beta-Carotene and Cod Liver Oil

Find the Best Vitamin A Supplement. Best Quality Vitamin A Supplements Identified, Including Cod Liver Oil.

Ashwagandha Supplements Review

Find the Best Ashwagandha Supplement. Only 56% of Ashwagandha Products Pass Tests.

Huperzine A Supplements Review

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

Digestive Enzyme Supplements Review

Big Differences in Strength Found Among Digestive Enzyme Supplements. CL Tests Reveal Which Are Best.

Acetyl-L-Carnitine Supplements Review

Choose the Best Acetyl-L-Carnitine Supplement. Don't Overpay! CL Identifies Quality Acetyl-L-Carnitine Supplements at the Best Value.

DHEA Supplements Review

Choose the Best DHEA Supplement. Beware of Big Differences in Dose and Price.

Lycopene Supplements Review

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

NAC (N-Acetyl Cysteine) Supplements Review

Choose the Best N-Acetyl Cysteine Supplement. See Our Tests of Popular NAC Supplements and Top Picks for Quality and Value.

Ginkgo (Ginkgo Biloba) Supplements Review

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

SAMe (S-adenosyl-methionine) Supplements Review

Choose the Best SAMe Supplement. CL Tests Reveal Big Differences in Quality and Cost.

Rhodiola Rosea Supplements Review

Do Rhodiola Supplements Help With Depression and Anxiety? Find Out and See Which Rhodiola Supplements Provide the Best Quality & Value.

L-Arginine Supplements Review

Choose the Best L-Arginine Supplement. Find Out Which L-Arginine Supplement Passed CL's Tests.

Maca Supplements Review

Choose the Best Maca Supplement. Make Sure Your Maca Supplement Isn't Contaminated With Lead.

GABA Supplements Review

Does GABA Work As a Supplement?

Prebiotic Supplements Review

You Can't Tell How Much Fiber Is Really In Most Prebiotics Without Testing

Olive Leaf Extract Supplements Review

Learn What Olive Leaf Does and the Best Brands

Black Currant Oil, Borage Oil, Evening Primrose Oil, Flaxseed Oil, and Hemp Oil Supplements Review: Sources of ALA and GLA (Omega-3 and -6 Fatty Acids)

Choose the Best Seed Oil Supplements. Find Out Which Flaxseed and Other Seed Oil Supplements Passed Our Tests.

Collagen Supplements Review

See our Top Picks for Wrinkles and Joints

CoQ10 and Ubiquinol Supplements Review

Find the Best CoQ10 and Ubiquinol Supplements and Learn How They Differ

Phosphatidylserine (PS) Supplements

Find out if phosphatidylserine helps with memory and which products are best.

L-Citrulline Supplements Review

Learn How Citrulline Products Differ and Our Top Picks

L-Lysine Supplements Review

Read L-Lysine Labels Carefully. Some Can Fool You.

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

Find the Best Vitamin D Supplement with the Right Dose

Elderberry Supplements Review

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

Reishi Mushroom Supplements Review

Find the Best Reishi Mushroom Supplement. See How Reishi Supplements Differ.

Vision Supplements Review (with Lutein, Zeaxanthin & AREDS2 Formulas)

Find the Best Vision Supplement Based Our Tests

Electrolytes & Sports Drinks Review

See Which Sports Drinks, Powders, and Pills Deliver the Right Electrolytes

Iron Supplements Review (Iron Pills, Liquids and Chews)

See Which Iron Supplements Are CL's Top Picks for Different Needs

Probiotic Supplements Review (Including Pet Probiotics)

Probiotics: See What They Really Contain and Our Top Picks

Selenium Supplements Review

Choose the Best Selenium Supplement. Find Out If You Need Selenium and Which Supplement Is Our Top Pick.

Astaxanthin Supplements Review

See Which Astaxanthin Products Passed or Failed CL's Tests

B Vitamin Supplements Review (B Complexes, B6, B12, Biotin, Folate, Niacin, Riboflavin & More)

See Which B Vitamins Are ConsumerLab's Top Picks!

Lavender and Tea Tree Essential Oils Review

Oils Tested for Authenticity and Purity

Lion's Mane and Chaga Supplements Review

Read Labels Carefully -- Many Can Mislead

Choline and Lecithin Supplements Review (Including Phosphatidylcholine, CDP-Choline, and Alpha-GPC)

Nutrition Bars & Cookies Review (For Energy, Fiber, Protein, Meal Replacement, and Whole Foods)

Find the Best Nutrition Bar or Cookie. ConsumerLab Tests Reveals Not All Nutrition Bars and Cookies Contain What They Claim.

Cholesterol-Lowering Supplements Review (Sterols/Stanols and Policosanol)

Find the Best Cholesterol-Lowering Supplement. See Which Plant Sterol and Policosanol Supplements Passed Our Tests and Are Our Top Picks.

Sexual Enhancer Supplements Review (with Yohimbe, Horny Goat Weed, Arginine)

Choose the Best Sexual Enhancer Supplement. Only 30% of Selected Sexual Enhancement Supplements Pass Quality Tests.

Vitamin C Supplements Review

Find the Best Vitamin C Supplements

Melatonin Supplements Review

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

Turmeric and Curcumin Supplements and Spices Review

See Our Top Picks Among Turmeric Products