Methylsulfonylmethane (MSM) is an organic source of sulfur, one of the major building blocks of glycosaminoglycans.* Glycosaminoglycans are key structural components in cartilage and play an important role in the maintenance of joint cartilage.* MSM is an important contributor to cartilage maintenance, and it helps support the cellular components within joints.*
*  Note: Unless otherwise noted, products on our web site have not been evaluated by the Food and Drug Administration. They are not intended to diagnose, treat, cure, or prevent any disease.