Tesamorelin & Ipamorelin: Studying their Potential in GH Production Molecular recognition of two approved drugs Macimorelin and Anamorelin by the growth hormone secretagogue receptor Acta Pharmacologica Sinica 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 From Belly to Brain: Targeting the Ghrelin Receptor in Appetite and Food Intake Regulation PDF) Ipamorelin, the first selective growth hormone secretagogue Difference Between Sermorelin and Ipamorelin