After 3 surgeries for various things including torn cartilage and loose bodies I started experiencing pain in my knee as I aged. As the pain got worse and I was literally dragging my keg behind me I decide to have it checked out. The doctor explained that the joint was riddled with bone spurs that was the start of arthiritis and would lead to eventual replacement. There was space left between the joint and no bone on bone so we thought I still had time. he suggested some experimental shots taken in a series but I declined. iw as going to opt for what I calle d a roto rooter procedure and clean out the bone spurs to buy some time. I started using glucosamine with chondritin and the culmative effect of the treatment really helped. However the pain did get worse and I opted for total knee replacement before I was too old to recover quickly. The best thing I ever did.