what's Swiss Chems MK677 Ibutamoren? MK-677, also known as ibutamoren or ibutamoren mesylate, is really a peptide that belongs to The expansion hormone secretagogues group (GHSR). it really works by mimicking the motion of your starvation hormone ghrelin. It binds to at least one of the growth hormone secretagogue receptors (GHSR) while in the brai