My friend who trains professionally has offered me some Clenbuterol and I was wondering a few things.
What does it do? (he just said its good for weight loss)
Is it harmful? (He dodges the legality question)
He also suggested something called Deca. Basically have the same questions about that.
Use google to search the net for the answer to your questions. Lots of info out there on clen. I would stay away if I were you. Also, find new friends.