what's Swiss Chems MK677 Ibutamoren? MK-677, also called ibutamoren or ibutamoren mesylate, can be a peptide that belongs to the growth hormone secretagogues group (GHSR). It works by mimicking the action with the hunger hormone ghrelin. It binds to one of the growth hormone secretagogue receptors (GHSR) while in the Mind, aiding raise progress hor