Ipamorelin is a potent growth hormone releasing peptide that has some potential advantages over some of the others. Although peptides seem to be doled out like aspirin, keep in mind that these are 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 Understanding low cortisol ACTH, secondary adrenal insufficiency, hypocorticolism Maternal Pituitary Support Sheehan's Syndrome, Lymphocytic Hypophysitis Prolactin Releasing Hormone an overview ScienceDirect Topics