Glucosamine promotes joint health and nutritionally works to promote the structural framework of healthy joints. Glucosamine and Chondroitin both provide the essential structural material glycosaminoglycan's which are required for healthy cartilage, promoting mobility, range of motion, flexibility and to ease occasional joint stress due to exercise or physical activity. MSM (Methylsulfonylmethane) provides a naturally occurring, bioavailable source of sulfur.