what's Swiss Chems MK677 Ibutamoren? MK-677, often known as ibutamoren or ibutamoren mesylate, is really a peptide that belongs to The expansion hormone secretagogues team (GHSR). It works by mimicking the action in the starvation hormone ghrelin. It binds to 1 of the growth hormone secretagogue receptors (GHSR) in the brain, encouraging maximize d