Glucosamine and chondroitin are supplements, occasionally used together to slow down the advancement of arthritis to help adults cope with arthritic pain. It is useful in the treatment of mild to acute osteoarthritis knee pain. In addition, the two supplements to have been used to treat the inflammation and discomfort of fibromyalgia or lupus, gout, and rheumatoid arthritis. This combination has proved successful when used for joint pain relief.
They work so well together because they are acknowledged as having similar effects on the body.