* Joint Health * Supports Healthy Joint Function * GMP-Quality Assured * A Dietary Supplement NOW Glucosamine, Chondroitin & MSM combines three of the most popular and effective nutrients for supporting joint health in one dietary supplement. Our Glucosamine and Chondroitin are both 100% sulfate, the most studied form of these nutrients. In addition, we also include MSM (Methylsulphonylmethane), an organic form of sulfur found in all living organisms. Studies have shown that these nutrients provide dietary components that support healthy joint structure and function. NOW Foods developed the glucosamine test method chosen as the official AOACI industry standard method.