Growth Hormone Secretagogue
Ipamorelin
BioHarmony verdict
Worth trying
Ipamorelin is a selective growth-hormone secretagogue with strong receptor selectivity but almost no human efficacy data: its only completed human efficacy trial (postoperative ileus, n=114) failed, per Beck 2014.
Read full reportWhat is Ipamorelin?
Ipamorelin is a lab-made peptide that nudges your own pituitary to release a short pulse of growth hormone, and its biggest selling point is what it does not do. It is a selective agonist at the ghrelin receptor (GHS-R1a), and unlike the older peptides it replaced, it raises growth hormone without meaningfully spiking cortisol or prolactin, per Raun 1998. That clean profile is real and well-documented. The catch sits one layer down: almost none of the reasons people actually buy ipamorelin (fat loss, recovery, better sleep, anti-aging) have been tested in humans.
From the BioHarmony report, reviewed 2026-09-08.
Safety watch-outs
- New or worsening numbness or tingling (possible fluid-related nerve compression): reduce dose or stop.
- Rising fasting glucose or HbA1c: stop and consult a clinician, especially with diabetes.
- Any active or suspected cancer: do not use
- growth-hormone-axis stimulation is contraindicated.
Full risk profile in the BioHarmony report.
Dosing as published
No approved-label or study protocol is recorded for Ipamorelin yet.
More reported protocols
MembersMembers can compare additional reported doses, schedules, and preparation notes.
Educator coverage (4)
Attributed viewpoints, separate from primary research.
- International Peptide Society 2018 Compound CurriculumDr. William Seeds · 2018-07-20
- My Top Peptide Stack for Mental Clarity & Muscle RepairAlex Kikel · 2025-07-08
- Ipamorelin - The Gateway Peptide Everything You Need To Get StartedHunter Williams · 2026-03-29
- Ipamorelin for Muscle Growth: Dosing and Stacking GuideJay Campbell · 2026-07-12
Trust & sourcing
FDA places ipamorelin acetate in 503B Category 2 and identifies immunogenicity, impurity-characterization, and limited route-specific safety information.
Primary sources
- Certain bulk drug substances for use in compounding that may present significant safety risksU.S. Food and Drug Administration · 2026-04-22
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