The role of 'adipotropins' and the clinical importance of a potential hypothalamicpituitaryadipose axis Nature Reviews Endocrinology Frontiers From the perspective of prolactin: a view on obesity 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 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