consumer research vitamins

Reviews & Articles

• Product Reviews (A-Z)
• Health Conditions
• Clinical Updates
• Recommended Intakes & Limits
• Avoid Counterfeits

Membership & Subscription

• Join Now & Get Full Access
• Member Sign In
• Group Subscriptions
• Give a Gift
• Member Support
• Join Free Newsletter

About ConsumerLab.com

• Meet Our Team
• Testimonials

About Testing

• Testing Programs
• Quality Certification Program & List
• How Products Were Tested
• ConsumerLab Seal
• News Releases
• ConsumerLab In The News
• ConsumerLab Annual Survey
• Privacy Policy

Ad-Free. Independent.  Powered by Members Like You.

See Which Magnesium Supplement Is Our Top Pick

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

See Our Top Picks Among Prebiotics and Save Money

Find the Best Psyllium Fiber Supplement and Avoid Lead

Some green teas provide barely any green tea polyphenols, while some others are high strength. See the Test Results and Our Top Picks for Green Tea.

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

NEW: Amazon Basics Filter Tested vs. Brita and Others

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

10 Most Popular ConsumerLab Product Reviews of 2023

Find Out If D-Mannose Helps Prevent Urinary Tract Infections and How Products Compare.

How to Avoid Fake Vitamins & Supplements Online

See Our Top Picks for Walnuts

Is Your Chocolate or Cocoa Healthful or Toxic? See Our Test Results.

Best Multis In 2023 -- Caution With Gummies

Alpha-Lipoic Acid: See How Much "Active" Form We Found

Find the Best Vision Supplement Based Our Tests

Most Popular Supplements? See What The Survey Showed

Statin vs Supplements for Lowering Cholesterol

7 Red Flags to Watch Out For When Buying Vitamins & Supplements

Join over 90,000 members.

Find the best products with instant access to our latest tests & reviews of over 1,400 health products .

Save money by finding high-quality products at lower cost.

Stay safe with the latest clinical findings, warnings, and expert answers .

Suggest products to test .

Stay informed with our e-newsletter .

"ConsumerLab is the best place to go to get information on supplements such as vitamins and minerals. They have comprehensive articles explaining what works, what doesn’t work, and what risks, if any, are involved."

Paul Blumstein - Fairfax, Virginia

ConsumerLab.com member since 2014

"Consumerlab provides me with the TRUTH (pros/cons) on products I purchase."

JoDell Stansel - Alvin, Texas

ConsumerLab.com member since 2010

"I love my ConsumerLab membership. I don't buy anything anymore without searching the best from your findings."

Devi N. - San Diego, CA

ConsumerLab.com member since 2017

"ConsumerLab.com is my go-to place to evaluate dietary supplements. It's an independent organization staffed by good people providing good advice for anyone taking supplements."

Zorba Paster, M.D., Physician and Radio Host - Oregon, Wisconsin

"I have used Consumerlab's independent test information to help select the best supplements such as calcium, magnesium, Co-enzyme Q-10, and others."

Jim W., RPh, MBA - New Hope, PA

ConsumerLab.com member since 2000

See Our Reviews of Popular Supplements and Healthy Foods

CoQ10 and Ubiquinol Supplements

Cocoa Powders, Dark Chocolate, Extracts, Nibs & Supplements

Collagen Supplements

Extra Virgin Olive Oil

Fish Oil /Omega-3 Fatty Acid Supplements

Magnesium Supplements

Melatonin Supplements

Multivitamin and Multimineral Supplements

Red Yeast Rice Supplements

• Vitamin D Supplements

All Products A to Z

Popular this week, magnesium for leg cramps.

Does magnesium reduce leg cramps? Find out in our Review. Also see our recent Top Pick among magnesium supplements.

Flaxseed and Blood Thinners

Does flaxseed have a blood-thinning effect, and might it interact with blood thinners such as warfarin (Coumadin) or apixaban (Eliquis)? Find out in our Review. Also see our Top Pick for flaxseed (whole and ground) and flaxseed oil.

Probiotic for Boosting Testosterone?

Did taking a probiotic boost testosterone levels in men? Find out in our Probiotics Review, which includes our Top Picks.

Avocado Oil Recalled

Over 2,000 cases of avocado oil have been recalled after the company warehouse found that avocado oil leaked in shipping containers. Get the details.

Organic Olive Oil?

Are pesticides used on olives and should I seek organic olive oil? See the discussion in our Review, which includes our Top Pick for organic extra virgin olive oil.

Recent Answers

I take warfarin (coumadin), an anticoagulant drug. are there supplements i should avoid, or be taking, due to this drug.

Find out which supplements should be avoided when taking blood thinners (anticoagulants) like warfarin (Coumadin), including vitamin K, St. John's wort, and curcumin.

Are there supplements I should avoid when taking apixaban (Eliquis) or similar blood thinner drugs like Xarelto?

Learn about supplement interactions with apixaban (Eliquis), rivaroxaban (Xarelto) and other blood thinner drugs in the direct factor Xa inhibitors class.

5 Tips for Finding a Soap or Body Wash That Won't Irritate Skin

Get 5 tips for finding soap or body wash that won't cause skin irritation. See which soaps we rate best, ingredients to avoid, and phrases on labels that can mislead.

10 Supplements That May Boost Testosterone (And 12 That May Not)

Many supplements promise to increase testestorone, boost libido, and increase muscle size, but, as ConsumerLab explains, the actual effectiveness of supplements is limited, and some supplements may actually reduce testosterone levels.

Do arnica pills, gels, creams, or sprays reduce bruising, pain, or swelling?

Find out if arnica pills, gels, creams, or sprays can reduce bruising, pain, or swelling, help with varicose veins, or muscle pain after exercise.

Upcoming Reviews

• Vision Supplement
• Ashwagandha Supplements
• B Vitamins & Complexes
• Calcium and Bone Health Supplements

Ratings of ConsumerLab

April 30, 2024

Attitude Soap

Magnesium for anxiety and sleep.

Find out your recommended daily amounts of vitamins and minerals.

• Recalls & Warnings

May 01, 2024

Organic Walnuts Recalled Due to E. Coli Risk

Fda warns consumers not to use ossos-sans supplement for joints.

April 29, 2024

Longreen Reishi and Xlim Express Coffee Recalled Due to Undeclared Allergens

April 25, 2024

Yogi Tea Recalled Due to Pesticides

Drug found in umary supplement, join over 250,000 people on our weekly email list., featured in.

OUR MISSION: To identify the best quality health and nutritional products through independent testing.

Product reviews.

• By Supplement Type
• By Health Condition
• Quality Certification Program
• CL Certified Products
• ConsumerLab Answers
• Recommended Intakes
• Join ConsumerLab
• In The News

ConsumerLab.com

• ConsumerLab Survey

© 2024 ConsumerLab.com, LLC. All rights reserved. ConsumerLab.com name and flask logo are both registered trademarks of ConsumerLab.com, LLC. This site is intended for informational purposes only and not to provide medical advice.