well when he is pretty convincing about it and sends the stuff to something called drug free sports some kind of organization or lab i dunno but he showed me the exact name of wut was in it that could possibly show up on a roid test.. and yes i believe it when he says the FDA cannot regulate everything GNC sells... and yes i believe when he says his track guy got tested positive using that recovery stuff from GNC and the drug free place said not to use it... i dont argue hes been with many NFL teams and college he knows his stuff.. and hey i dont want to risk my whole season down the drain cuz of muscle milk.