Bill Natural Sources CollagenBuild Complex is primarily composed of Glucosamine, Chondroitin Sulfate and Unhydrolyzed Collagen type II. Glucosamine is a factor in maintaining healthy cartilage and joint health by strengthening cartilage and aiding glycosaminoglycan synthesis in the synovial fluid. Chondroitin Sulfate is used to relieve joint pain associated with osteoarthritis, especially for the knees as it is a heavily used joint. Unhydrolyzed Collagen type II is a major structural component of hyaline cartilage found in the sternum and synovial joints. It is clinically proven to decrease pain and morning stiffness, and relieve tender and swollen joints. In combination with Glucosamine and Chondroitin Sulfate, it not only relieves bone and joint pain symptoms, but also aids in the formation of connective tissues. CollagenBuild™ Complex significantly helps relieve joint pain associated with osteoarthritis as well as maintains healthy cartilage. NPN: 80036871