Valid Data on Supplements for Osteoarthritis Limited

While many older athletes are turning to glucosamine to help maintain healthy joints and cartilage, some sports medicine experts say its true effectiveness is still unknown.

"There is some information in the veterinary literature about the effects of glucosamine supplementation, but we still do not have any substantial scientific studies in humans," says Dr. Lon Castle, a sports medicine specialist at Baylor College of Medicine.

Glucosamine is a naturally occurring amino sugar involved in the formation of nails, tendons, skin, eyes, bones, ligaments and heart valves. It is commonly combined with sulfate and taken as a dietary supplement. These supplements are reported to reduce pain and tenderness associated with osteoarthritis, reduce swelling, improve range of motion and help cartilage retain its "shock absorbing" property. In addition to supporting healthy joints, these supplements are also thought to assist the body in generating connective tissue.

"The bottom line is that we don't know a lot about glucosamine, but it does not seem to be harmful," Dr. Castle says. "However, not every person is going to get the results they hope for."

- From Baylor College of Medicine

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