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Sermorelin Mechanism of Action

How Sermorelin works: receptor targets, signalling pathways, and molecular profile.

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Compiled from published research · Last updated 2026-07-24T00:00:00.000Z

The Minimal Active Fragment of GHRH

Sermorelin reproduces the first 29 amino acids of native growth hormone-releasing hormone (GHRH) — the minimal fragment shown to retain full biological activity of the complete 44-amino-acid hormone. It binds the pituitary's GHRH receptor, triggering endogenous GH release.

Fast Clearance Preserves Natural Pulsatility

Sermorelin clears the body quickly — its short half-life means it produces a single, physiological GH pulse rather than sustained receptor stimulation. This is thought to better preserve the pituitary's natural pulsatile release pattern compared to longer-acting, DAC-modified GHRH analogs like CJC-1295.

References

  1. Khorram GHRH(1-29) body composition study · Khorram O, et al. · 1997
All Sermorelin sections

Ipamorelin

growth & GHCgrade

A selective GH secretagogue (ghrelin mimetic) that raises growth hormone with minimal effect on cortisol or appetite.

hCG (Human Chorionic Gonadotropin)

growth & hormonesSgrade

An FDA-approved hormone that mimics LH, restoring the body's own testosterone and sperm production — the label dates to 1962.

Tesamorelin + Ipamorelin Blend

growth & GHBgrade

A single-vial blend pairing FDA-approved GHRH analog Tesamorelin with the selective ghrelin-agonist Ipamorelin for a combined GH pulse in one injection.

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