Let me be honest, my gym is a bit of a pharmacy!
LOL
For some of the big boys, and from the random chats we have pre-comp, HGH is used. Some of the guys prefer Stacks, and then of course you got the cutting agents and clens. HGH basically sucks you in and makes you look really tight, shredding you up, and the effects do last that little bit longer than standard fat burners from what I have been told!
Hope this helps!