what exactly is Swiss Chems MK677 Ibutamoren? MK-677, also called ibutamoren or ibutamoren mesylate, is a peptide that belongs to The expansion hormone secretagogues group (GHSR). It works by mimicking the action with the starvation hormone ghrelin. It binds to 1 of the growth hormone secretagogue receptors (GHSR) within the Mind, encouraging maxim