What is Ipamorelin?
Ipamorelin is a synthetic peptide containing five amino acids (Aib-His-D-2-Nal-D-Phe-Lys-NH2). It belongs to the class of Growth Hormone Releasing Peptides (GHRPs). Developed as a third-generation secretagogue, Ipamorelin was designed to overcome the "off-target" effects of earlier compounds like GHRP-2 and GHRP-6.
In research settings, Ipamorelin is favored for its "clean" profile, providing a potent stimulus for growth hormone secretion while maintaining the integrity of other endocrine pathways.
⚗️ Key Research Facts
- Class: GHRP (Growth Hormone Releasing Peptide)
- Selectivity: High (Does not affect Cortisol/Prolactin)
- Structure: Pentapeptide
- Primary Goal: Physiological GH Pulsatility
Mechanism: GHS-R1a Selectivity
Ipamorelin works by mimicking the hormone **Ghrelin** and binding to the Growth Hormone Secretagogue Receptor (GHS-R1a) in the pituitary gland and hypothalamus. This binding triggers a pulsatile release of growth hormone.
Why Selectivity Matters
While older GHRPs also bind to this receptor, they often have a "spillover" effect on the receptors for ACTH (which releases cortisol) and prolactin. Ipamorelin is unique in its chemical structure, which allows it to bind specifically to the GHS-R1a without triggering these secondary stress and reproductive hormone responses.
Ipamorelin vs. GHRP-2 & GHRP-6
| Feature | Ipamorelin | GHRP-6 | GHRP-2 |
|---|---|---|---|
| GH Potency | Strong | Moderate | Very Strong |
| Appetite Stim. | None / Minimal | High | Moderate |
| Cortisol Impact | None | Mild-Moderate | High |
| Prolactin Impact | None | Mild-Moderate | High |
Research Benefits & Findings
By increasing the body's natural production of growth hormone, research into Ipamorelin has yielded several key findings in metabolic and tissue research:
Tissue Repair
Accelerates the healing of muscle, bone, and connective tissue by increasing systemic GH and IGF-1.
Lipolysis
Promotes the utilization of fat as energy, improving body composition without the jittery effects of stimulants.
Sleep Quality
Improves deep-sleep architecture, which is the primary window for natural hormonal recovery.
Research Protocols & Stacking
- Administration: Subcutaneous injection.
- Research Dose: 200 mcg to 300 mcg per injection.
- Timing: Best administered on an empty stomach, typically before bed or in the morning.
- Synergy: Stacking with a GHRH (like CJC-1295) creates a larger pulse than either peptide alone by increasing both GH synthesis and GH release.
Frequently Asked Questions
Does Ipamorelin cause hunger?
No. One of the primary reasons researchers choose Ipamorelin over GHRP-6 is that it does not cause the intense hunger spikes associated with earlier ghrelin mimetics.
Is Ipamorelin safe for long-term research?
Research suggests Ipamorelin is safer than other GHRPs because it doesn't lead to elevated cortisol or prolactin, reducing the risk of hormonal imbalances during long-term studies.
Where to buy Ipamorelin in Canada?
Nūmira Peptides offers laboratory-grade Ipamorelin with >98% purity and third-party testing. Shop Ipamorelin →
Ipamorelin — Research Grade
Purity >98% · Selective GHS · Reliable Canadian shipping
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