MK-677

Research Profile

MK-677 (Ibutamoren) is an orally active, non-peptide growth hormone secretagogue that acts by binding to the ghrelin receptor (GHS-R1a). By mimicking the natural hormone ghrelin, it stimulates the pituitary gland to release growth hormone (GH) and increases circulating levels of insulin-like growth factor 1 (IGF-1). This modulation influences a wide array of metabolic, enzymatic, and signaling pathways, promoting tissue growth, repair, and regeneration. MK-677 has been shown to support lean muscle development, enhance bone density, improve sleep quality, and aid recovery, making it a versatile compound in research contexts focused on aging, muscle wasting, metabolism, and endocrine function. Its oral bioavailability, long half-life, and selective mechanism distinguish it from peptide-based secretagogues.