What Are CJC-1295 & Ipamorelin?
The GHRH + GHRP research pairing explained.
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Compound guide
What Is Tesamorelin?
A stabilized GHRH analog studied for its effect on growth-hormone signalling — what it is, how it works, and how it’s handled.
Tesamorelin sits in the same broad family as CJC-1295 — it’s a growth-hormone-releasing hormone analog. What sets it apart is stability: it’s a modified form of GHRH built to hold up better than the natural hormone.
Research use only. This article is an educational overview of an investigational compound. It is not medical advice, makes no treatment or dosing recommendations, and does not describe human use.
What is tesamorelin?
Tesamorelin is a stabilized synthetic analog of GHRH (growth-hormone-releasing hormone). By mimicking GHRH, it is studied for how it prompts the pituitary to release growth hormone. Note that tesamorelin has a narrow approved clinical use for a specific medical condition; on this site it is discussed only as a research compound and supplied for research use only.
How does it work?
GHRH is the body’s natural trigger for growth-hormone release. As a GHRH analog, tesamorelin engages that same GHRH pathway at the pituitary. Because it’s a stabilized version, it’s of research interest for acting on that pathway in a more durable form than native GHRH.
Tesamorelin vs other GH-releasing peptides
The GH-releasing peptides split by which signal they use. Tesamorelin and CJC-1295 are both GHRH analogs; ipamorelin works on a different receptor entirely.
| Peptide | Class | Pathway |
|---|---|---|
| Tesamorelin | GHRH analog | GHRH receptor |
| CJC-1295 | GHRH analog | GHRH receptor |
| Ipamorelin | GHRP | Ghrelin receptor |
How is tesamorelin handled in the lab?
Like most research peptides, tesamorelin arrives as a lyophilized (freeze-dried) powder. Before it can be used in solution it has to be reconstituted:
- Keep the sealed vial cool, dry, and out of direct light.
- Reconstitute with bacteriostatic water — see how to reconstitute peptides and how much BAC water to use.
- Store the reconstituted solution in the refrigerator, where it stays stable for weeks.
Why purity matters
With an investigational peptide, knowing exactly what is in the vial is everything. A reputable source provides a Certificate of Analysis (COA) showing third-party HPLC purity and mass-spec identity for that specific batch. If you are not sure how to read one, see what is a COA.
Where to buy
Sourcing research-grade tesamorelin
We recommend Vital Chems for tested compounds and bacteriostatic water.
- Third-party HPLC tested — COA on every order
- Same-day shipping before 1:30 PM PT
- US-based, fast and responsive support
Frequently asked questions
What is tesamorelin?
A stabilized synthetic analog of GHRH (growth-hormone-releasing hormone), studied for its effect on growth-hormone signalling and supplied for research use only.
How is tesamorelin different from CJC-1295?
Both are GHRH analogs that act on the same pathway. They differ in their exact structure and how they are stabilized; ipamorelin, by contrast, works through a different (ghrelin) receptor.
Is tesamorelin approved?
It has a narrow approved clinical use for one specific condition. On this site it is discussed only as a research compound and supplied for research use only; nothing here describes or recommends human use.
How is tesamorelin stored and prepared?
It ships as a freeze-dried powder, kept cool and dry, and is reconstituted with bacteriostatic water before use. After reconstitution it is refrigerated.