Ipamorelin: Research Overview and Mechanism
Ipamorelin is a selective synthetic pentapeptide agonist of the growth hormone secretagogue receptor (GHS-R1a) studied in laboratory and preclinical research for growth hormone-secretion dynamics and somatotroph signaling. It is noted in research literature for its selectivity relative to earlier secretagogues, which makes it a useful tool compound for isolating GHS-R signaling. It is supplied as a lyophilized powder for research use only and is not approved for human use.
What Ipamorelin is
Ipamorelin is a synthetic pentapeptide (a five-residue chain, Aib-His-D-2-Nal-D-Phe-Lys-NH2) that acts as an agonist of the growth hormone secretagogue receptor, GHS-R1a, the same receptor engaged by the endogenous ligand ghrelin. It is a compact, well-characterized tool compound with a molecular weight near 712 g/mol.
Within the secretagogue family it is frequently described as selective: research literature notes that it engages GHS-R signaling with less influence on other secretagogue-associated pathways than earlier compounds. That selectivity is the reason it is often chosen to isolate GHS-R activity in a research model.
Pathways it is studied within
In laboratory and preclinical research, Ipamorelin is used to investigate GHS-R (ghrelin) receptor agonism, growth hormone-secretion dynamics, and somatotroph signaling. On binding GHS-R1a, a Gq-coupled receptor, it drives phospholipase-C signaling and intracellular calcium release in pituitary somatotrophs, the same cascade engaged by endogenous ghrelin, which is the mechanistic basis for its use as a selectivity probe alongside the GHRP hexapeptides.
Beyond preclinical models, ipamorelin has also been investigated in human clinical trials reported in the research literature, including a Phase 2 study of postoperative ileus in bowel-resection patients, although it has not received regulatory approval for any use. That clinical context is reported here in the third person as published research about the molecule; it does not describe an effect of this product, which is supplied for research use only and is not approved for human use.
Handling and documentation
Pinnacle Ipamorelin ships as a lyophilized pentapeptide (molecular weight near 712 g/mol) stored at -20C and kept out of direct light, then reconstituted with bacteriostatic water without vigorous shaking, since mechanical agitation can shear a short peptide in solution. Because its value as a tool compound rests on receptor selectivity, each batch carries a lot-matched Certificate of Analysis from HPLC and mass-spectrometry testing that documents identity and purity before use. See our reconstitution and storage guide for handling detail.
All products are intended strictly for in-vitro laboratory research and development use only. Not for human or veterinary use, not a drug, food, or cosmetic, and not intended to diagnose, treat, cure, or prevent any disease.