what's Swiss Chems MK677 Ibutamoren? MK-677, often called ibutamoren or ibutamoren mesylate, is usually a peptide that belongs to The expansion hormone secretagogues group (GHSR). It works by mimicking the motion of the starvation hormone ghrelin. It binds to one of the growth hormone secretagogue receptors (GHSR) while in the Mind, encouraging boo