Structural basis of human ghrelin receptor signaling by ghrelin and the synthetic agonist ibutamoren Nature Communications pamorelin is a pentapeptide that selectively triggers the body's own pulsatile release of growth hormone. Ipamorelin is a five amino acid peptide that acts as a selective ghrelin and growth hormone secretagogue receptor agonist. Ipamorelin Wikipedia Ipamorelin Did You Know? Ipamorelin is a peptide classified as a growth hormone secretagogue, studied for its interaction with the ghrelin receptor (GHS R1a). Researchers examine how this pathway influences controlled