Like IM said, it is an amphetamine (same family as Speed, Crank, Ice, GLass, and if youve ever smoked this shit, then youd feel like you were on E), it will supress your hunger. Though I always got mine back aftr 6 hours. One thing is for sure if that the shit will DRY YOU OUT. its not uncommon to come out of an E trip 6 or 7lbs lighter When I used to roll, this was common. Of course id regain it over the corse of the week, but still, it certainly cant HELP muscle building!