What is Swiss Chems MK677 Ibutamoren? MK-677, also called ibutamoren or ibutamoren mesylate, is often a peptide that belongs to the growth hormone secretagogues group (GHSR). It works by mimicking the action from the starvation hormone ghrelin. It binds to 1 of the growth hormone secretagogue receptors (GHSR) while in the brain, encouraging improve… Read More