Sermorelin vs Ipamorelin: Which peptide is right for you? NiceRx Managing Hyperprolactinemia and Sexual Side Effects from Antipsychotic Use Psychopharmacology Institute 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 Prolactin a pleiotropic factor in health and disease Nature Reviews Endocrinology