precisely what is Swiss Chems MK677 Ibutamoren? MK-677, also referred to as ibutamoren or ibutamoren mesylate, can be a peptide that belongs to The expansion hormone secretagogues team (GHSR). It works by mimicking the action from the starvation hormone ghrelin. It binds to at least one of The expansion hormone secretagogue receptors (GHSR) during