We use superior science to make smarter formulas like Jarrow Formulas® MSM, a source of sulfur. Sulfur is an antioxidant mineral found in the body's structural proteins (i.e., chondroitin sulfate, dermatan sulfate, and hyaluronic acid). Sulfur-containing structural proteins are in connective tissues like joint cartilage and skin. MSM supports connective tissue and joint health.* *These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.