A European research study presented at the American College of Rheumatology confirms what many alternative health consumers already know. Glucosamine sulfate, a supplement made of crustacean shells, scientifically qualifies as a viable treatment for arthritis. In a study of 212 patients with osteoarthritis, those taking glucosamine over a period of three years experienced improved physical function with less pain and stiffness, while members of a placebo group showed deterioration of their condition. This research marks the first time a major human study has proven the effectiveness of an alternative treatment already in extensive use through word-of-mouth popularity.