Ipamorelin is one of the most studied peptides within growth-hormone research and is often mentioned in the same breath as CJC-1295. In this guide we explain, research-only, what Ipamorelin is, why it is called “selective” and how it relates to a GHRH analogue — without any health or performance claims.
Ipamorelin is a pentapeptide studied as a selective growth-hormone-releasing peptide (GHRP). It is often studied together with the GHRH analogue CJC-1295. It is not a medicine and is offered for research only, ≥99% pure with a COA per batch.
What is Ipamorelin?
Ipamorelin is a pentapeptide — a chain of five amino acids — studied in research as a growth-hormone-releasing peptide (GHRP). GHRPs form a distinct class of growth-hormone secretagogues that act on the growth-hormone axis via the ghrelin receptor. New to peptides? First read what peptides are.
Why Ipamorelin is called 'selective'
In the research literature Ipamorelin is described as a selective GH secretagogue. That term refers to its relatively specific action on the growth-hormone pathway as observed in preclinical studies. It is a characterisation from a research context and not a confirmation of an effect in humans; no health claims are attached to it.
Ipamorelin vs. CJC-1295: GHRP vs. GHRH
The key difference: Ipamorelin is a GHRP and CJC-1295 a GHRH analogue — two different points of action on the same growth-hormone axis. Precisely because they work via different routes, they are a recurring subject of combined research. Peptide Lab offers both separately — Ipamorelin and CJC-1295 no DAC — as well as a ready-made CJC-1295 + Ipamorelin blend. Read more about the GHRH side in what is CJC-1295.
How is Ipamorelin reconstituted?
Ipamorelin is supplied as a lyophilised powder and reconstituted in the lab with bacteriostatic water. Determine the right water ratio and the units to draw with the reconstitution calculator, or read the step-by-step explanation in how to reconstitute peptides.
Purity and documentation
Reproducible research into the growth-hormone axis requires material with verified purity and full traceability. Every batch of Ipamorelin at Peptide Lab is tested by Janoshik Analytical at ≥99% purity by HPLC and mass spectrometry, with a public certificate per lot number. Browse the whole growth-hormone category or our approach on the science page.
This information is general and intended solely for a research context. Peptide Lab supplies Ipamorelin for laboratory and research purposes only. Not for human or animal consumption, not a medicine and not medical advice.
Frequently asked questions about Ipamorelin
What is Ipamorelin?
Ipamorelin is a pentapeptide studied in research as a selective growth-hormone-releasing peptide (GHRP). It is not an approved medicine and is offered for research only.
What is the difference between Ipamorelin and CJC-1295?
Ipamorelin is a GHRP and CJC-1295 a GHRH analogue; they act on the growth-hormone axis via different routes. In research they are therefore sometimes studied together. This is a description of research designs, not usage advice.
Why is Ipamorelin called 'selective'?
In the research literature Ipamorelin is described as a selective GH secretagogue, referring to its relatively specific action on the growth-hormone pathway in preclinical studies. This concerns research, not a confirmed effect in humans.
Is Ipamorelin pure at Peptide Lab?
Yes, Ipamorelin is lab-verified at ≥99% purity by HPLC and mass spectrometry, with a public Janoshik certificate per batch. For research purposes only.
