what exactly is Swiss Chems MK677 Ibutamoren? MK-677, generally known as ibutamoren or ibutamoren mesylate, is a peptide that belongs to the growth hormone secretagogues group (GHSR). It works by mimicking the action in the hunger hormone ghrelin. It binds to at least one of the growth hormone secretagogue receptors (GHSR) in the Mind, encouraging