Growth Hormone Explained: Actions, Regulation, and Peptide Based Optim Revolution Health & Wellness PDF] Ipamorelin, the first selective growth hormone secretagogue. Semantic Scholar 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 What Is Ipamorelin and How Does It Compare vs HGH and Peptides GHRH vs GHRP Growth Hormone Research Differences PRG Effects of ghrelin, growth hormonereleasing peptide6, and growth hormonereleasing hormone on growth hormone, adrenocorticotropic hormone, and cortisol release in type 1 diabetes mellitus ScienceDirect