Yeah, from what I've seen, you do trim down but it's likely you'll lose muscle along with fat. It kills your appetite so it would be very hard to eat enough to keep the muscle on. I guess if you could force feed yourself enough it would work, but I'm hearing it's almost impossible to do.
There is another peptide similar to it, monjouro or something like that. I havent read much on it so it might also kill appetite. I'll research it but it might be worth looking into yourself.