Supports Cartilage and Joint Function Two Month Supply Dietary Supplement Easy SolvGlucosamine Sulfate is a stable, clinically studied form of glucosamine, which is essential for the proper formation of tendons, ligaments, synovial fluid, bones, skin, nails, and blood vessels.MSM is a sulfur donor; sulfur is essential for the formation of chondroitin sulfates. Vitamin C and manganese are required for synthesis of collagen and cartilage. Adequate vitamin D3 supports joint health.For best results, use with Jarrow Formulas JarroSil, the biologically Activated Silicon. Jarrow Formula glucosamine sulfate is Sodium Free and stabilized with potassium chloride (KCI).