what exactly is Swiss Chems MK677 Ibutamoren? MK-677, often known as ibutamoren or ibutamoren mesylate, is a peptide that belongs to the growth hormone secretagogues group (GHSR). It works by mimicking the motion from the starvation hormone ghrelin. It binds to 1 of the growth hormone secretagogue receptors (GHSR) within the brain, encouraging maxi