Research Peptides Studied on the Growth Hormone Axis: An Overview

The growth hormone axis is one of the most studied signalling systems in peptide research, with compounds acting at several different points along it. This research-only overview groups them and shows how they relate.

GHRH analogues

These mimic growth-hormone-releasing hormone. Sermorelin is the close-to-natural reference, tesamorelin is a longer-acting analogue, and the compound in CJC-1295 blends is another widely studied example.

Secretagogues (ghrelin mimetics)

These act at the ghrelin/GHS receptor instead. Ipamorelin is the selective reference compound, while GHRP-2, GHRP-6, and hexarelin are earlier, less selective secretagogues.

Why the two classes are studied together

GHRH analogues and secretagogues enter the axis by different routes, so researchers frequently pair them to study how the two signals compare or combine. Our comparison articles take the same side-by-side approach used here.

Related compounds

HGH (somatropin) is studied as the downstream hormone itself, providing a reference point for the whole axis.

Handling across the category

All are lyophilised and reconstituted with bacteriostatic water. Follow sterile technique and use the reconstitution calculator for concentrations.

Quality and verification

With many closely related compounds, purity documentation is what keeps a comparison meaningful. Understanding how purity is verified helps you read each Certificate of Analysis.

Research use only. This article is educational and is not medical, legal, or financial advice. The compounds discussed are not approved for human or veterinary use, consumption, or therapeutic application.