Growth Peptides for Bodybuilding: Expert Insights & Protocols R2 Medical Clinic 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 Frontiers From the perspective of prolactin: a view on obesity Frontiers Non Canonical Effects of ACTH: Insights Into Adrenal Insufficiency