Product Reviews
Garlic Supplements Review

Reviewed and edited by Tod Cooperman, M.D. Tod Cooperman, M.D.
Initial Posting: 6/26/20 

Find the Best Garlic Supplements

CL Tests Reveal Big Differences in Garlic Strength -- Some Have Little to No Garlic!

Garlic Supplements Reviewed by
Alphabetical list of garlic supplement brands compared in this review
AlliMax Allicin Life Extension Optimized Garlic Spring Valley Garlic
Garlique Nature's Way Garlinase Swanson Best Garlic Odor-Controlled
Kyolic Aged Garlic Extra Strength Reserve Solgar Garlic Powder The Vitamin Shoppe Aged Garlic Extract
AlliMax Allicin Garlique Kyolic Aged Garlic Extra Strength Reserve Life Extension Optimized Garlic Nature's Way Garlinase Solgar Garlic Powder Spring Valley Garlic Swanson Best Garlic Odor-Controlled The Vitamin Shoppe Aged Garlic Extract
Make sure you use a garlic supplement that passed our tests and is right for you!  Isn't your health worth it?

If you already are a member, SIGN IN now.
  • What did ConsumerLab find in garlic supplements? One widely sold garlic supplement appeared to contain little or no garlic, based on finding no detectable amounts of the garlic compounds allicin, alliin (a precursor to allicin that's most abundant in raw garlic), and SAC (a derivative of allicin). In contrast, all others had significant amounts, ranging from roughly 5,000 to 40,000 mcg of total allicin (including a portion of alliin) and from 27 to 12,900 mcg of SAC per daily serving. Interestingly, some of the products that were not labeled as aged garlic had higher amounts of SAC than the aged garlic supplements. None of the supplements exceeded acceptable limits of contamination with lead, cadmium, or arsenic, and products claiming to be enteric-coated were found to live up to this claim.
  • Which are the best garlic supplements? ConsumerLab selected three garlic supplements as Top Picks based on their total allicin and/or SAC levels, overall quality, and value.
  • What does garlic do? Health benefits of garlic include modest reductions in cholesterol levels (by reducing triglycerides) and blood pressure. It may also slightly reduce the risk of atherosclerosis and may help prevent colds, but garlic does not help treat an existing cold. Preliminary evidence suggests garlic may have some protective role with regard to gastric cancer in limited situations (See What It Is).
  • Does garlic have side effects? Other than bad breath (which is a problem with fresh garlic, garlic powders, and some extracts but not a problem with aged garlic and some odor-controlled garlic), the most common side effect of garlic supplements is gastrointestinal upset. These and other side effects, as well as potential drug interactions, are discussed in the Concerns and Cautions section.
You must be a member to get the full test results along with's recommendations and quality ratings. You will get results for nine garlic supplements selected by and two others that passed testing in its voluntary Quality Certification Program.

In this comprehensive review, you'll discover:
    • Which garlic supplements failed or passed our tests and why.
    • CL's Top Picks, representing the best garlic garlic supplements based on amounts of garlic compounds, overall quality, and value
    • Amounts of key garlic compounds allicin, alliin and/or S-allylcysteine (SAC) found in each product
    • The clinical evidence for garlic supplementation for reducing cholesterol, triglycerides and blood pressure
    • The different forms of garlic in supplements, including non aged and aged garlic, garlic powder and dried garlic, garlic extracts, garlic oil and black garlic
    • Amounts of key garlic compounds in fresh garlic and garlic cloves and how these compare to supplements
    • Garlic supplement side-effects, drug interactions, and cautions  

If you already are a member, SIGN IN now.

Learn More About Garlic Answers -- for Garlic Supplements Review
Does garlic lower cholesterol? Get the answer >>

What supplements should I stop taking before surgery? Get the answer >>

Are enteric coated supplements better than non-enteric coated ones? Get the answer >>

Which supplements can help lower cholesterol and keep my heart healthy? Are there any to avoid? Get the answer >>

I take warfarin (Coumadin), an anticoagulant drug. Are there supplements I should avoid, or be taking, due to this drug? Get the answer >>

I have been having dizziness for the past few months and am wondering if it could be a side effect of supplements I take. Which supplements cause dizziness? Get the answer >>

I have low blood pressure. Are there any supplements I should avoid? Get the answer >>

Which supplements can help to lower blood pressure? Get the answer >>

What are the health benefits of black garlic? Get the answer >>

What are the most common, potentially dangerous interactions between supplements and drugs? Get the answer >>

Do any supplements help for flu? Get the answer >>

Which supplements can help lower my triglycerides? Get the answer >>

What are natural remedies for coronavirus (COVID-19)? Do supplements like zinc, vitamin C, or herbals work? Get the answer >>

Want to see more?

To view this article in its entirety, please click below on the "Log In" button if you are already a subscriber or the "Subscribe" button to learn how to subscribe.

Join |  Sign In
Join Us on Facebook! Join Us on Instagram! Join Us on Twitter! Join Us on YouTube! Join Us on YouTube!
Product Reviews
Brands Tested
Health Conditions
CL Answers
Clinical Updates
Recalls & Warnings
Recommended Intakes
Where to Buy Products
Testing Program
How Products Were Tested
Quality Certification Program
Join CL Today
Join Free Newsletter
Group Subscriptions
Gift Membership
About Us
The CL Seal
CL Survey
Privacy Policy
Contact Us/Help

©2020, LLC. All rights reserved. A single copy of a report may be printed for personal use by the subscriber. It is otherwise unlawful to print, download, store or distribute content from this site without permission. name and flask logo are both registered trademarks of, LLC. This site is intended for informational purposes only and not to provide medical advice.