i just got done with leg day and my left knee is killin me guys, this is the same knee i had surgery on after i blew out my ACL and all of my cartlidge....i havent re-injured it but the acheing is too much to handle, i dont want to have a knee replacement by the time im 30 , so can anyone suggest a good supplement for this shit and where should i buy it? and i know all about glucosamine/chondritin, though i havent been taking it, anything better??