Acetyl Glucosamine is one of the raw materials used to form new cartilage in the body. Acetyl Glucosamine is needed to form the glycosaminoglycans and synovial fluid that help keep the joints cushioned and well lubricated.  glucosamine has been proven in several clinical studies to help ease symptoms of osteoarthritis, rheumatoid arthritis, and bursitis, as well as other disorders associated with a breakdown of the cartilage regenerative process.