Content reviewed by clinical research staff

Last reviewed: March 2026Sources: PubMed, FDA, WADA Prohibited List

Evidence graded using the PeptideScholar A-D system.

Hexarelin

Growth hormone releasing peptide6 amino acids

BHuman Studies
80
Good Credibility
2 cited studies | Evidence level B

Hexarelin is one of the most potent synthetic GH secretagogues. Research also suggests it has direct cardioprotective effects independent of its GH-releasing properties.

Mechanism of Action

Activates GHS receptors for GH release. Uniquely, also binds CD36 scavenger receptors in cardiac tissue, providing direct cardioprotective effects independent of GH signaling.

Benefits

  • Most potent GH release among GHRPs[1]
  • Direct cardioprotective effects via CD36 binding[1]
  • Improved cardiac function in heart failure models[1]
  • Anti-atherosclerotic properties observed[1]
Not medical advice - research-reported information only

This content is for informational purposes only and does not constitute medical advice.

Hexarelin - Dosing in Published Research

Reported routes: Subcutaneous injection, Intravenous
Clinical studies used 1-2 mcg/kg IV or SC. Desensitization of GH response observed after weeks of continuous use.

The dosing information above is sourced from published research literature and clinical trials. These are not recommendations. Individual responses vary. Always consult a healthcare provider before considering any peptide-based therapy.

Side Effects

  • Elevated cortisol and prolactin[1]
  • GH response desensitization with chronic use[1]
  • Flushing[1]
  • Water retention[1]

Considering peptide research?

Hexarelin is not FDA-approved. Always consult a licensed healthcare provider before considering any peptide.

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Research & Evidence

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References

  1. 1.Hexarelin protects H9c2 cardiomyocytes from doxorubicin-induced cell death.. Endocrine, 2001. "Hexarelin protected H9c2 cardiomyocytes from doxorubicin-induced cell death in vitro, suggesting direct cardioprotective properties independent of GH release" [PMID: 11322493]
  2. 2.The Growth Hormone Secretagogue Hexarelin Protects Rat Cardiomyocytes From in vivo Ischemia/Reperfusion Injury Through Interleukin-1 Signaling Pathway.. Int Heart J, 2017. "Hexarelin binds cardiac CD36 receptors, protecting against ischemia-reperfusion injury independent of GH release" [PMID: 28321024]

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