"Glucosamine is being investigated extensively for its action in osteoarthritis. However, there is a lack of consensus in clinical trials regarding its efficacy."

"Glucosamine is a supplement that is often combined with another supplement, chondroitin to help the pain of osteoarthritis. Glucosamine is made from crab shells and chondroitin, from cow trachea. "

"Glucosamine is a natural constituent of healthy cartilage and synovial fluid in the joints of the body. It is derived from glucose and the amino acid glutamine, and as we age we tend to produce less. Our bodies use glucosamine to build and repair cartilage, tendons, ligaments, synovial fluid and other tissues. We need glucosamine primarily for the healthy structure, strength and shock absorbing functions of our joints."