Molecular recognition of two approved drugs Macimorelin and Anamorelin by the growth hormone secretagogue receptor Acta Pharmacologica Sinica Ipamorelin vs Sermorelin: GH Secretagogue Comparison Which Is Better? PPW Peptide Protocol Wiki CJC 1295 Peptide: Structure, Benefits, and Research Use 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 Sermorelin or Ipamorelin: Meaning, Differences, Benefits, Side Effects, and Which One May Be Better