Hello everybody! Does anybody out there use any form of glucosamine, chondroitin or MSM? If so, do you see benefits from it? It seems like I'm having some joint pain in my shoulder and knees. I rotate all my workouts as not to over-use body parts and I really watch my form especially on squats and lunges. BUT, it seems like my left knee (on the inside right by the kneecap) gets a painful "catch" in it sometimes. It immediately goes away, but will act up again on my walks. Any ideas/thoughts will be helpful...and grateful.