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Research peptide

Ipamorelin

Ipamorelin is a selective growth hormone secretagogue receptor agonist peptide studied for GH release with a relatively focused receptor profile compared with earlier GHRPs.

By The Peptides Codex Editorial TeamReviewed July 10, 2026
Length
5 aa
Class
Research peptide
Function
Selective ghrelin receptor (GHS-R) agonist
Context
Research compound (not an approved drug)

Often searched with CJC-1295 in GH secretagogue research.

Part of the Growth hormone & IGF peptides cluster

Overview

Ipamorelin is a selective growth hormone secretagogue receptor agonist peptide studied for GH release with a relatively focused receptor profile compared with earlier GHRPs.

Source & context

Biological / chemical source: Synthetic pentapeptide

Primary research or clinical context: Research compound (not an approved drug)

Receptor selectivity

Ipamorelin is frequently described as more selective than GHRP-2 or GHRP-6, with less reported impact on cortisol and prolactin in experimental contexts — a key reason for its research popularity.

FAQ about Ipamorelin

What is Ipamorelin?+

Ipamorelin is a selective growth hormone secretagogue receptor agonist peptide studied for GH release with a relatively focused receptor profile compared with earlier GHRPs.

Is Ipamorelin an approved medicine?+

Ipamorelin is discussed here as a research / educational topic. Research compound (not an approved drug). This is not medical advice.

What is the typical length of Ipamorelin?+

Ipamorelin is commonly described as approximately 5 amino acids (Research peptide).

Related peptides

References & further reading

  1. 1.Wikipedia — Ipamorelin
  2. 2.PubChem — compound summary for Ipamorelin (CID 9831659)
  3. 3.Raun et al. (1998). Ipamorelin, the first selective growth hormone secretagogue. Eur J Endocrinol
  4. 4.Johansen et al. (1999). Ipamorelin, a new growth-hormone-releasing peptide, induces longitudinal bone growth in rats. Growth Horm IGF Res
  5. 5.Malmlöf et al. (1999). Methylprednisolone does not inhibit the release of growth hormone after intravenous injection of a novel growth hormone secretagogue in rats. Growth Horm IGF Res
  6. 6.Svensson et al. (2000). The GH secretagogues ipamorelin and GH-releasing peptide-6 increase bone mineral content in adult female rats. J Endocrinol
  7. 7.Andersen et al. (2001). The growth hormone secretagogue ipamorelin counteracts glucocorticoid-induced decrease in bone formation of adult rats. Growth Horm IGF Res
  8. 8.Venkova et al. (2009). Efficacy of ipamorelin, a novel ghrelin mimetic, in a rodent model of postoperative ileus. J Pharmacol Exp Ther
  9. 9.Greenwood-Van Meerveld et al. (2012). Efficacy of ipamorelin, a ghrelin mimetic, on gastric dysmotility in a rodent model of postoperative ileus. J Exp Pharmacol
  10. 10.Beck et al. (2014). Prospective, randomized, controlled, proof-of-concept study of the Ghrelin mimetic ipamorelin for the management of postoperative ileus in bowel resection patients. Int J Colorectal Dis
  11. 11.Broglio et al. (2002). Ghrelin: much more than a natural growth hormone secretagogue. Isr Med Assoc J
  12. 12.Halem et al. (2004). Novel analogs of ghrelin: physiological and clinical implications. Eur J Endocrinol
  13. 13.Fehrentz et al. (2002). Growth hormone secretagogues: past, present and future. IDrugs
  14. 14.Smith et al. (1993). A nonpeptidyl growth hormone secretagogue. Science
  15. 15.Kojima et al. (1999). Ghrelin is a growth-hormone-releasing acylated peptide from stomach. Nature
  16. 16.Shin et al. (2015). Therapeutic applications of ghrelin agonists in the treatment of gastroparesis. Curr Gastroenterol Rep
  17. 17.Greenwood-Van Meerveld et al. (2011). Ghrelin as a target for gastrointestinal motility disorders. Peptides
Disclaimer: Educational content only. Not medical advice. Not instructions for human use. Research peptides and unapproved products may be restricted or illegal to market for human consumption in your jurisdiction. Consult qualified professionals and applicable law.
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