Glucosamine is most often used (sometimes combined with chondroitin) to ease joint pain caused by arthritis. It is a natural compound found in healthy cartilage and joint fluid that keeps joints healthy. Glucosamine also works to rebuild damaged cartilage in joint tissue.
Natural glucosamine levels drop as people age. As the cartilage then wears away, it leads to pain and stiffness in the joint.
Glucosamine sulfate supplementation can help reverse this and ease the pain of mild to moderate osteoarthritis of the knee and also with other joint pain caused by osteoarthritis and rheumatoid arthritis.