Ipamorelin is a synthetic peptide and growth hormone secretagogue. It stimulates the pituitary gland to release growth hormone (GH) in a gentle, pulsatile manner by mimicking the hormone ghrelin. Unlike other GH-releasing peptides, it does not significantly increase hunger or cortisol levels. It is commonly used in research and wellness settings to improve recovery, sleep quality, lean muscle mass, and fat loss, with minimal side effects.