what's Swiss Chems MK677 Ibutamoren? MK-677, often known as ibutamoren or ibutamoren mesylate, can be a peptide that belongs to website The expansion hormone secretagogues team (GHSR). It works by mimicking the action of the hunger hormone ghrelin. It binds to 1 of The expansion hormone secretagogue receptors (GHSR) inside the brain, encouraging bo