what exactly is Swiss Chems MK677 Ibutamoren? MK-677, also called ibutamoren or ibutamoren mesylate, is really a peptide that belongs to the growth hormone secretagogues team (GHSR). It works by mimicking the action of the starvation hormone ghrelin. It binds to 1 of the growth hormone secretagogue receptors (GHSR) during the Mind, helping enhance