I have hip and knee bursitis. Walking was very painful, esp in the hip joint on my right side. A sports friend told me to take Glucosamine, Chondroitin and MSM. I had side effects (headache, heart palps) at first and then had to break my capsules open and take only 1/4 of it to start. But after 2 weeks I stopped having pain and walking got easier. Wonderful supplements. Highly recommend to anyone with arthritis.