To maintain the normal mobility of joints. Glucosamine and chondroitin sulfate are the building blocks of the cartilage tissue. MSM can be found in the structural protein of joints and cartilage. Collagen is the structural protein of the connective tissue and the bones. The body produces collagen by itself, but with aging the production decreases. Cartivet + msm suits especially for horses under intensive training, whose joints are under a lot of stress, and to senior horses whose mobility is limited.