Ipamorelin is a pentapeptide. Five amino acids. That's it. But three of those five don't exist in nature. The sequence: Aib His D 2 Nal D Phe Lys, with a C terminal amide. Position 1 is aminoisobutyric acid the Thermoregulatory role of ghrelin in the induction of torpor under a restricted feeding condition Scientific Reports Ipamorelin is a potent growth hormone releasing peptide that has some potential advantages over some of the others. Although peptides seem to be doled out like aspirin, keep in mind that these are Figure 3 from Ipamorelin, the first selective growth hormone secretagogue. Semantic Scholar