I started going to gym about 2 months ago. The first day they offered me some proteins, but I preferred not to buy them. Right now they are offering me L-Carnitine, that is supposed to be some kind of stimulant and helps you burn fat. As far as I have searched in google there seems to be no side effects. So what I am curious about is if anyone here use these kind of things? Or have any experience in this topics.