Ipamorelin: A Scientific Perspective on a Selective Growth Hormone Secretagogue PARTICLE, s. r. o. 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 Table 3 from Ipamorelin, the first selective growth hormone secretagogue. Semantic Scholar Ipamorelin Wikipedia GHRP 2 vs GHRP 6: What's the Difference? Exploring Peptides What Is Ipamorelin and How Does It Compare vs HGH and Peptides