what exactly is Swiss Chems MK677 Ibutamoren? MK-677, also known as ibutamoren or ibutamoren mesylate, is often a peptide that belongs to the growth hormone secretagogues team (GHSR). it really works by mimicking the action of the hunger hormone ghrelin. It binds to at least one of the growth hormone secretagogue receptors (GHSR) in the Mind, assis