Glucosamine sulfate is a widely used supplement that may help ease pain in people with osteoarthritis. Osteoarthritis happens when cartilage breaks down. This can cause joint pain. Millions of people have osteoarthritis. Scientists have been studying glucosamine sulfate alone, and together with another supplement called chondroitin, for many years. Research results have been conflicting. Some studies show the supplement reduces knee pain in people with moderate-to-severe osteoarthritis. However, it doesn't seem to work as well in people who: Have mild knee pain Have had the condition for a long time Are overweight The supplement seems to reduce pain as much as ibuprofen. But it doesn't work as fast. It can take four to eight weeks for glucosamine sulfate to ease pain.
