Glucosamine, chondroitin sulfate, and MSM (methylsulfonylmethane) occur naturally in the body, while MSM is synthetically produced. ...
Glucosamine, chondroitin sulfate, and MSM supplements are used to protect against deterioration of cartilage between joints, also known as osteoarthritis. They have been proven to significantly reduce the pain involved with degenerative joint diseases, and even promote the formation and repair of cartilage.