Glucosamine Sulfate is a dietary supplement to support connective tissue & joint functions. Glucosamine is an amino sugar normally formed in the body from glucose. It is the starting point for the synthesis of glycosaminoglycans (GAGs), including hyaluronic acid, a main constituent of joint fluid. Glucosamine supplementation supports the thick gelatinous nature of the joint fluids, joint hydration, & flexibility as well as the function of joints, spinal discs & other connective tissues.