MK677 SARM is a selective androgen receptor agonist (SARM), MK677 also known as Ibutamoren, which is a ghrelin receptor and growth hormone secretion agent that increases the secretion of growth hormone (GH) and insulin-like growth factor 1 (IGF-1) by mimicking the endogenous hormone ghrelin on growth hormone (GH), increasing plasma levels of these two …