Growth Hormone Secretagogue

Ipamorelin

6.2/10

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.

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What 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

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Members can compare additional reported doses, schedules, and preparation notes.

Educator coverage (4)

Attributed viewpoints, separate from primary research.

Trust & sourcing

US approvalNot FDA approved
CompoundingFDA Category 2 for 503B use
Last checked2026-07-13
Next review2026-10-11

FDA places ipamorelin acetate in 503B Category 2 and identifies immunogenicity, impurity-characterization, and limited route-specific safety information.

Primary sources

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