Ipamorelin is a synthetic peptide classified as a growth hormone-releasing peptide (GHRP). It selectively stimulates the pituitary gland to release growth hormone (GH) by mimicking ghrelin, a hormone that regulates hunger and GH secretion. Unlike other GHRPs, Ipamorelin is highly selective, primarily increasing GH without significantly affecting cortisol or prolactin levels, making it a safer option with fewer side effects. It has a short half-life of about 2 hours and is typically administered via subcutaneous injection.