# Ipamorelin in Australia: What It Is and How It Is Tested Ipamorelin is a synthetic pentapeptide, five amino acids long, that binds and activates the growth hormone secretagogue receptor. In Australia, Australian Research Peptides supplies laboratories and researchers with it as a single-peptide lyophilised vial, posted from Sydney. Its sequence, Aib-His-D-2-Nal-D-Phe-Lys-NH2, matches no stretch of any human protein, and its identity is confirmed by mass spectrometry and HPLC. The single vial is a separate listing from the CJC-1295 (no DAC) + Ipamorelin blend. Supplied for in vitro research purposes only. - Source: https://www.australianresearchpeptides.au/articles/ipamorelin-australia - Reading time: 4 minute read - Published: 2026-09-24 - Publisher: Australian Research Peptides --- In vitro research only. Ipamorelin is sold here as laboratory material. The sections below report published cell and animal studies; none of them gives a quantity, a timetable or guidance for any person or animal. ## What Is Ipamorelin? Ipamorelin is a fully synthetic peptide of five amino acids, Aib-His-D-2-Nal-D-Phe-Lys-NH2, classed as an agonist of the growth hormone secretagogue receptor. It was developed at Novo Nordisk under the code NNC 26-0161 and first described in 1998. Three of its five building blocks are not found in ordinary proteins, two are mirror-image D-forms, and the chain finishes in an amide rather than an acid. That sequence occurs in no human protein: ipamorelin was designed from scratch rather than cut from a natural chain. ## Which Receptor Does Ipamorelin Act On? Ipamorelin acts on the growth hormone secretagogue receptor, also known as the ghrelin receptor: it binds the site that the hormone ghrelin normally occupies and switches the receptor on. A secretagogue is anything that prompts a cell to release a substance, and here the cells are the growth-hormone-producing cells of the pituitary. The 1998 paper by Raun and colleagues that introduced the compound is titled “Ipamorelin, the first selective growth hormone secretagogue”. Its authors placed the activity at a GHRP-like receptor, and worked in three systems: primary rat pituitary cells, anaesthetised rats and conscious pigs. ## What Does the Research Literature Study Ipamorelin For? Published ipamorelin research follows two strands: how the peptide drives growth hormone release in pituitary cells and animals, and how it affects movement through the gut in rat models. - **Growth hormone release.** The original characterisation measured the growth hormone response in isolated rat pituitary cells, in rats and in swine. It reported on the receptor and the response, not on any outcome in a person. - **Gastrointestinal motility.** A 2009 study by Venkova and colleagues asked whether ipamorelin would speed gastrointestinal transit in fasted male rats after abdominal surgery and handling of the intestine, a model of postoperative ileus. Ipamorelin has no marketing approval in any country. A clinical programme was run and later discontinued, so the published record is the laboratory and animal work above. ## Is Ipamorelin the Same as the CJC-1295 and Ipamorelin Blend? Ipamorelin on its own is not the same product as the CJC-1295 (no DAC) + Ipamorelin blend: the single vial holds ipamorelin only, while the blend dries two different peptides together in one vial. The partner peptide in the blend, CJC-1295 without DAC, works through a different receptor — the GHRH receptor — which is why the two are paired rather than treated as alternatives. What the DAC label means, and how the blend is split between its two components, is set out in [CJC-1295 with DAC vs no DAC](https://www.australianresearchpeptides.au/articles/cjc-1295-dac-vs-no-dac) and on [the blend’s own listing](https://www.australianresearchpeptides.au/products/cjc-1295-ipamorelin). ## How Is Ipamorelin Tested? Ipamorelin is tested by HPLC, which measures what share of the powder runs as a single peak, and by mass spectrometry, which checks that the molecule weighs what a five-residue chain with an amide end should weigh. PubChem records the free base at about 712 g/mol. Supplied peptide is often a salt, which shifts the measured mass, so the batch document rather than a catalogue figure is what describes the material in a given vial. The ipamorelin that Australian Research Peptides lists carries the HPLC Verified grade and is analysed by an independent laboratory, engaged by the manufacturer, before it goes on sale. The [CoA library](https://www.australianresearchpeptides.au/coa) does not hold an ipamorelin report today, and one will be added there once a certificate is available. [Peptide testing, purity and CoAs](https://www.australianresearchpeptides.au/articles/peptide-testing-purity-coa) explains what each section of a certificate establishes. ## How Is Ipamorelin Supplied in Australia? Australian Research Peptides supplies ipamorelin to laboratories and researchers as a single-peptide 10 mg vial of freeze-dried powder, sealed against tampering and posted within Australia, so nothing waits on an import clearance. The [ipamorelin listing](https://www.australianresearchpeptides.au/products/ipamorelin) is out of stock for now and takes a one-off email alert for the next batch. Unopened, the powder is kept frozen and away from light and moisture. ## Common Questions ### Where Can Laboratories Buy Ipamorelin in Australia? Laboratories and researchers in Australia can buy ipamorelin from Australian Research Peptides, which lists the pentapeptide as a 10 mg freeze-dried vial and posts it domestically. It is out of stock right now, and the listing lets you register for an email when the next batch arrives. ### Is Ipamorelin a Growth Hormone? Ipamorelin is not a growth hormone. It is a five-amino-acid peptide that acts on a receptor in the pituitary gland, whereas growth hormone is a much bigger protein which that gland produces and releases. ### What Is Ipamorelin Also Called? Ipamorelin is also referred to by its development code, NNC 26-0161, and by its sequence, Aib-His-D-2-Nal-D-Phe-Lys-NH2. It is a different molecule from GHRP-2 and GHRP-6, although papers group all three as growth hormone secretagogues. Ipamorelin is catalogued by Australian Research Peptides for laboratories and researchers as a single-peptide vial under Growth Hormone Research, presently out of stock, with every order posted domestically from Sydney. For in vitro research purposes only. ## References 1. [Raun K, Hansen BS, Johansen NL, Thøgersen H, Madsen K, Ankersen M, Andersen PH. Ipamorelin, the first selective growth hormone secretagogue. Eur J Endocrinol. 1998 Nov;139(5):552-61. PMID 9849822.](https://pubmed.ncbi.nlm.nih.gov/9849822/) 2. [PubChem CID 9831659 — Ipamorelin (National Library of Medicine).](https://pubchem.ncbi.nlm.nih.gov/compound/9831659) 3. [Venkova K, Mann W, Nelson R, Greenwood-Van Meerveld B. Efficacy of ipamorelin, a novel ghrelin mimetic, in a rodent model of postoperative ileus. J Pharmacol Exp Ther. 2009 Jun;329(3):1110-6. PMID 19289567.](https://pubmed.ncbi.nlm.nih.gov/19289567/) ## Related guides - [Beginner's Guide to Research Peptides](https://www.australianresearchpeptides.au/articles/research-peptides-beginners-guide) - [GLP-1, GIP and Glucagon: What the Receptor Names Mean](https://www.australianresearchpeptides.au/articles/glp-1-gip-glucagon-receptor-targets) ## Related compounds - [Ipamorelin](https://www.australianresearchpeptides.au/products/ipamorelin) - [CJC-1295 (no DAC) + Ipamorelin](https://www.australianresearchpeptides.au/products/cjc-1295-ipamorelin) --- _Plain-text version of https://www.australianresearchpeptides.au/articles/ipamorelin-australia. The web page is the canonical version of this article._ _All products supplied by Australian Research Peptides are for in vitro research purposes only._