About 20 years ago my knee started hurting after about an hour and a half of tennis. It got so bad I had to quit playing and could only walk about 30 minutes before it became painful. I had been receiving the Second opinion
News Letter for several years and I read about Advanced Joint Support. I did not think it would work but because there was a money back guarantee I figured what the heck, give it a try. After taking it for about three weeks I could not tell a difference, but one day I was walking and after about an hour told my wife my knee did not hurt, we kept walking and it went on for two hours with no pain.
A couple of weeks later my old tennis partners asked if I wanted to play tennis and I told them I would give it a try but may have to quit after 20 or 30 minutes. To my surprise two sets went by and no pain. I have used AJS ever since. I have recommended it to about 15 people over the years and it worked for 12 of them, but the other three got their money back. Not sure why it worked for some and not others but I'm very happy with it.