In the News - Press Coverage     Testimonials     Press Releases


WHITE PLAINS, NY, March 7, 2000 — Among 25 major brands of supplements containing glucosamine and/or chondroitin used for treating osteoarthritis, nearly one-third were found not to contain all labeled ingredients. These results were reported today by, which conducts the largest independent analysis of dietary supplements sold in the U.S. More alarming, almost half (6 out of 13) of the glucosamine-chondroitin combination products tested did not pass — all due to low chondroitin levels. Similarly, the two chondroitin-only products tested did not pass. In contrast, all ten of the glucosamine-only products tested passed.. One possible explanation for the low pass rate for chondroitin-containing products is economic — chondroitin costs manufacturers approximately four times as much as glucosamine.

"Consumers have to be very careful when selecting these products due to the variability in chondroitin levels," said Tod Cooperman, M.D., president of Supplements containing glucosamine and/or chondroitin represent one of the largest segments of the estimated $14 billion U.S. dietary supplement market.

The list of products that passed's independent testing, as well as more information about the Product Review, are available at To further assist consumers, is licensing its flask-shaped Seal of Approved Quality to manufacturers and distributors to use on products that have passed testing. will periodically re-evaluate these products to ensure their compliance with its standards. purchased the tested products through retail stores, on-line retailers, and direct sales or multi-level marketing companies. This is the third major dietary supplement Product Review reported by The next Product Review, to be released in late March, is of SAMe (S-adenosyl-methionine) products. SAMe is used in treating arthritis and depression and has grown rapidly in popularity in the U.S. over the past year. By year-end, will have tested most of the popular dietary supplement categories sold in the U.S. provides online reviews and consumer information about health, wellness, and nutrition products. The company is privately held and headquartered in White Plains, New York. It is not affiliated with companies that manufacture, distribute, or sell consumer products. Parties interested in licensing content or requesting testing of additional products may contact Lisa Sabin, Vice President for Business Development, at More information about is available at

Copyright, LLC, 2000. All rights reserved. For use only by news organizations. Other parties wishing to republish this information are required to have prior written permission from

— END —

back to top



Coronavirus and Supplements
Coronavirus & Supplements
Note: We are continuously updating this information as evidence comes in.

Product Reviews

In addition to our product reviews our encyclopedia covers the following:

Herbs & Supplements


Drug Interactions

Alternative Therapies


Follow us on...
facebook twitter
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.