Your don't think someone could be refilling and recapping their old pharmacom vials? They've got a real good reputation wouldn't be too hard for someone to take advantage of that.
I think it's possible if it were some online source. I think it's less likely that a guy he bought from face to face at the gym that will obviously have to see him again would take the time to fill a Pharmacom vial with fake shit. It's possible, but I believe it to be unlikely.