Peptides > Ipamorelin


Ipamorelin is a pentapeptide, composed of five amino acids. This compound acts as a GH secretagogue, functioning as an agonist that can bind to specific cell receptors and initiate cellular responses. In animal test subjects, Ipamorelin stimulates the pituitary gland to increase the secretion of growth-related substances while concurrently inhibiting the production of somatostatin, a secretion that suppresses growth. Moreover, Ipamorelin promotes the production of IGF-1 (Insulin-like Growth Factor 1), which plays a pivotal role in the growth and repair of muscular and skeletal tissues.

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1. Introduction to Ipamorelin


2. Molecular Structure of Ipamorelin


3. Research on Ipamorelin


4. Conclusion

Introduction to Ipamorelin

The Ipamorelin Peptide is gaining attention as a growth hormone secretagogue. In scientific research, it has shown promising potential in stimulating the production of growth hormones. This peptide may bring a myriad of potential benefits.

Molecular Structure of Ipamorelin

Sequence: Aib-His-D-2-Nal-D-Phe-Lys-NH2
Molecular formula: C38H49N9O5
Molar Mass: 711.85296
CAS number: 170851-70-4
PubChem: CID 20754357
Synonyms: Ipamorelin Acetate, IPAM, NNC-26-0161

Research on Ipamorelin

Part 1. Ipamorelin Peptide: Overview and How It Works

Ipamorelin is a unique pentapeptide derived from GHRP-1, known for its selective release of growth hormone (GH) while leaving other hormone levels largely unaffected.

Part 2. Pharmacological Study of Ipamorelin Peptide

A comprehensive study has examined the pharmacological profile of Ipamorelin, revealing key insights into its behavior within the human body.

Key findings of the study include:

  • Dose-proportional PK parameters, indicating predictable effects at different doses.
  • A short 2-hour half-life, suggesting rapid metabolism.
  • Clearance of 0.078 L/h/kg and a steady-state volume of distribution of 0.22 L/kg.
  • A rapid burst of GH release, with the peak occurring at 0.67 hours.
  • An SC50 of 214 nmol/L for half-maximal GH stimulation.
  • A maximal GH production rate of 694 mlU/L/h.

Part 3. Ipamorelin Benefits and Clinical Uses

Ipamorelin has shown promise in various medical fields, with studies highlighting its potential applications.

1. Ipamorelin and Bone Mineral Content in Rats

Research on bone mineral content (BMC) demonstrated that Ipamorelin and GHRP-6 increased BMC without affecting bone mineral density (BMD).

Key findings include:

  • Significant increases in cortical BMC.
  • Expanded femur and vertebra L6 volumes.
  • Increased body weight, cortical bone area, and BMC.
  • Notable improvements in dry defatted weight and bone volume after 12 weeks.

2. Ipamorelin Stimulates Longitudinal Bone Growth in Rats

Ipamorelin positively influenced longitudinal bone growth rate (LGR) and body weight (BW) in rats.

Key findings include:

  • Dose-dependent increases in LGR and BW gain.
  • No impact on total IGF-I levels, IGFBPs, or serum bone markers.
  • Unchanged tibia metaphysis cells.

3. Ipamorelin for Postoperative Ileus Management

A study evaluated Ipamorelin’s role in postoperative ileus management, with promising results.

Key findings include:

  • A shorter median time to the first tolerated meal in the Ipamorelin group.
  • Similar safety and efficacy profiles between Ipamorelin and placebo groups.

Part 4. Potential Ipamorelin Side Effects

Ipamorelin, as a growth hormone secretagogue, may lead to certain side effects, although further research is needed to confirm them.

Possible side effects may include:

  • Fluid retention
  • Joint pain
  • Headaches
  • Increased appetite
  • Heightened response to insulin, affecting blood sugar levels.

It’s important to note that the side effect profile of Ipamorelin requires more extensive investigation, given its limited research status. Further studies are essential to establish its long-term safety and potential risks.


Ipamorelin is a growth hormone secretagogue. It has selective and potential benefits in bone growth and postoperative ileus management. While some potential side effects have been suggested, further comprehensive research is needed to understand its safety and efficacy fully.

Article Author

The above literature was researched, edited and organized by Dr. Logan, M.D. Dr. Logan holds a doctorate degree from Case Western Reserve University School of Medicine and a B.S. in molecular biology.


The product information featured on this website pertains exclusively to in-vitro studies. In-vitro studies, also known as ‘in glass’ studies, are conducted outside of living organisms. It’s important to emphasize that these products do not constitute medicines or drugs and have not received FDA approval for the prevention, treatment, or cure of any medical conditions, ailments, or diseases. It is crucial to note that the introduction of these products into the bodies of humans or animals is strictly prohibited by law.