Growth Hormone PeptidesResearch Chemical

Ipamorelin

Also known as: NNC 26-0161

The cleanest GH secretagogue — selective growth hormone release with minimal side effects.

Subcutaneous injection

Molecular structure image coming soon

Research use only. Not FDA-approved. Best used under medical supervision with IGF-1 monitoring.

Overview

Ipamorelin is a selective Growth Hormone Secretagogue (GHS) and ghrelin receptor agonist. It is widely considered the most selective GHRP available, stimulating GH release without significantly elevating cortisol or prolactin — making it the preferred option for those concerned about side effect profiles. Most commonly paired with CJC-1295 (no DAC).

Mechanism of Action

Ipamorelin mimics ghrelin and binds to the GHS receptor (ghrelin receptor) in the pituitary and hypothalamus, stimulating growth hormone release. Unlike other GHRPs, it has high selectivity and does not cause significant cortisol, prolactin, or ACTH elevations.

Use Cases

  • Growth hormone optimization
  • Lean muscle development
  • Fat loss acceleration
  • Improved sleep quality
  • Recovery and anti-aging
  • GH deficiency protocols

Research Summary

Multiple clinical studies confirm ipamorelin's potent and selective GH-releasing activity. It produces a dose-dependent increase in GH without the cortisol and prolactin spikes seen with other GHRPs. The CJC-1295 + Ipamorelin combination is among the most prescribed peptide protocols in anti-aging medicine.

Typical Dosing

100–300 mcg 2–3x daily, typically at night 30–60 minutes before sleep on empty stomach. Often stacked with CJC-1295 (no DAC).

Administration

Subcutaneous injection

Research Chemical

Research use only. Not FDA-approved. Best used under medical supervision with IGF-1 monitoring.

Verified Sources for Ipamorelin

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Clinics Offering Ipamorelin Therapy