WHAT IS IT
Glucosamine is a supplement made from shellfish that can provide pain relief. Glucosamine sulfate slows the progression of osteoarthritis of the knee.

Glucosamine is sold primarily as a dietary supplement. Studies show that glucosamine sulfate supplementation will reduce the breakdown of collagen (joint tissue) and the symptoms of osteoarthritis.

WHY TAKE IT
Glucosamine supplements may not cure osteoarthritis, but it may slow the progression of the disease.

For you with diabetes:
Although previous studies suggest that glucosamine supplementation may cause insulin resistance, follow-up studies conclude that it does not affect glucose metabolism.

HOW TO TAKE IT
Studies in athletes supplementing glucosamine are limited, but preliminary evidence suggests that doses as high as 3000 mg of glucosamine sulfate may be able to reduce joint breakdown.

This effect is most relevant for athletes who participate in sports with high wear on the legs, such as running.