I have arthritis in my knee, which over the years has worsened to the point it interferes with working out, walking, going up stairs. I have tried numerous arthritis supplements and none seemed to do much to alleviate the pain. I decided to try FlexProtex, and within the week my knee pain started to diminish. I was able to workout without an elastic knee brace as well. I don't know how FlexProtex will work for anyone else, but I'm eternally grateful that I found FlexProtex!