what's Swiss Chems MK677 Ibutamoren? MK-677, generally known as ibutamoren or ibutamoren mesylate, is actually a peptide that belongs to the growth hormone secretagogues group (GHSR). It works by mimicking the motion of the starvation hormone ghrelin. It binds to one of the growth hormone secretagogue receptors (GHSR) during the Mind, serving to bo