exactly what is Swiss Chems MK677 Ibutamoren? MK-677, also called ibutamoren or ibutamoren mesylate, is a peptide that belongs to the growth hormone secretagogues group (GHSR). It works by mimicking the motion of your starvation hormone ghrelin. It binds to one of The expansion hormone secretagogue receptors (GHSR) from the brain, helping raise gro