MSM tests
This article was originally published in The Tan Sheet
Executive Summary
Fifteen of 17 methylsulfonylmethane products tested meet label claims, ConsumerLab.com reports. Gas chromatography showed two failing products contained only 85%, 88% of labeled amount of MSM. Few products contained dimethyl sulfoxide, a related compound with sulfur-like odor indicative of poor manufacturing practices, online firm notes. Several products tested were included in prior reviews of glucosamine/chondroitin, vitamin C (1"The Tan Sheet" March 13, 2000, p. 7 and 2May 22, 2000, p. 10)