what exactly is Swiss Chems MK677 Ibutamoren? MK-677, also referred to as ibutamoren or ibutamoren mesylate, is often a peptide that belongs to the growth hormone secretagogues group (GHSR). It works by mimicking the motion from the starvation hormone ghrelin. It binds to 1 of The expansion hormone secretagogue receptors (GHSR) within the brain, se