They must market this stuff to the Woodstock Generation! Anyway, the thread on knee surgery made me think of this. For twenty years my knees would be in enough pain to keep me from sleeping. I don't know what the trouble was specifically, but I started drinking "Joint Juice" (liquid glucosamine) last August, and all that pain,swelling, and stiffness has gone away. Get it at Sam's Club. It takes a month or so for it work, and I drink a can a day now. Good luck. Guy