Compound Library

Peptide / GH Axis

Hexarelin

Most potent GHRP by GH release per mcg. Desensitises rapidly after 2–4 weeks — must cycle. Significant cortisol and prolactin elevation. Best used in short 4–6 week cycles.

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Educational reference only. This page does not diagnose, prescribe, or replace care from a licensed professional. Laws, availability, and clinical appropriateness vary by location.
Reference dose100–200 mcg SubQ 2x/day
Half-life0.5 hours
Risk flagmoderate
Regulatory noteResearch-only flag

Side effects and watch-outs

  • Rapid receptor desensitisation (GH response blunts after 4+ weeks)
  • Significant cortisol elevation
  • Prolactin elevation
  • Water retention
  • Fatigue
  • Joint stiffness
  • Must cycle — continuous use loses effectiveness