What is CJC-1295 + Ipamorelin?
CJC-1295 + Ipamorelin is a research pair of two peptides that both get the body to release its own growth hormone — but they fit two different "doors" (scientists call these docking spots, or receptors). CJC-1295 is a lab-made copy of GHRH(1–29) — the working part of the body's natural "release growth hormone" signal — built to last a long time and fit the GHRH door. Ipamorelin is a tiny peptide (just five building blocks) described as the first selective growth-hormone signal of its kind, and it fits a completely separate door — the ghrelin door.
The pair is studied because the two peptides work in complementary ways: they open two different doors that both lead to the same growth-hormone-making cells in the gland. One important note up front: each one is a laboratory research peptide only — neither is a medicine, and nothing here describes use in people or animals.
The quick version
A long-lasting GHRH copy
CJC-1295 — a lab-made copy of GHRH, built to last, that fits the GHRH door.
A different kind of signal
Ipamorelin — a tiny five-block peptide that fits a separate door (the ghrelin door).
Two doors, one gland
The pair is studied as a two-door way to prompt the gland's own growth hormone.
99%+ pure
Double-checked by lab testing (HPLC + LC-MS) and shipped with a certificate for every batch — research use only.
Work with research-grade CJC-1295 + Ipamorelin
A two-door growth-hormone pair, 99%+ pure, with a certificate of analysis in every order — for laboratory research use only.
View CJC-1295 + IpamorelinCJC-1295: a long-lasting copy of the GHRH signal
CJC-1295 was designed to fix one problem with the natural signal: it doesn't last long. The short GHRH(1–29) piece is cleared from the body quickly, so it can only knock on the door for a little while. CJC-1295 solves this with a clever trick:
- It grabs onto a blood protein — CJC-1295 carries a small part that latches onto a common protein in the blood (called albumin). Riding along on that protein, it stays in the body much longer.
- It lasts for days — in a controlled human study, a single dose kept growth hormone and its follow-on marker (IGF-1) raised for several days, with the copy lasting roughly 6–8 days.
- It fits the GHRH door — like sermorelin and tesamorelin, CJC-1295 fits the GHRH door on the gland's cells to prompt the gland's own growth hormone, rather than adding growth hormone from outside.
It's part of the same GHRH-copy family as the plain Sermorelin piece and the longer-lasting full-length copy Tesamorelin. What sets CJC-1295 apart is that blood-protein trick, which lets it last much longer.
Ipamorelin: a different kind of growth-hormone signal
Ipamorelin was made in a peptide-chemistry project and described as the first "selective" growth-hormone signal of its kind — meaning it prompts growth hormone without stirring up as many other hormones. Where CJC-1295 fits the GHRH door, ipamorelin fits a completely different one:
- The ghrelin door — lab tests showed ipamorelin prompts growth hormone through the ghrelin door, the same door used by a natural hunger-and-growth signal called ghrelin.
- It's picky (selective) — in the first studies, ipamorelin released growth hormone about as strongly as an older signal called GHRP-6, but unlike those older ones it did not noticeably raise stress hormones (ACTH and cortisol). That tidier profile is what drew interest.
- It pairs well with GHRH copies — because the ghrelin door and the GHRH door are separate, signals like ipamorelin are often studied alongside GHRH copies like CJC-1295.
Other early animal studies looked at ipamorelin's growth-hormone-related effects — for example, how it affected the body's protein balance in rats given steroids, and markers of bone building — always in controlled animal research.
Why the two are studied together
The reason researchers pair a GHRH copy with the other kind of signal is simple: they complement each other — two doors, two signals, one gland. The table below places the pair next to related growth-hormone peptides:
| Compound | Group | Door it uses |
|---|---|---|
| CJC-1295 | GHRH copy | The GHRH door |
| Sermorelin | GHRH copy | The GHRH door |
| Tesamorelin | GHRH copy | The GHRH door |
| Ipamorelin | Different type (GHRP) | The ghrelin door |
Because GHRH copies and the other kind of signal reach the gland's cells by separate routes, they're commonly studied as a combined tool. Peptora offers the CJC-1295 + Ipamorelin pair alongside standalone Sermorelin and the Tesamorelin + Ipamorelin blend, each with its own certificate of analysis. For how each one works in more depth, see the Sermorelin and Tesamorelin guides.
What scientists actually study it for
Across the studies on the two parts, a few connected topics come up again and again:
- Growth-hormone release — how opening the GHRH door and the ghrelin door affects the gland's own growth-hormone output in research models.
- IGF-1 signal — the follow-on IGF-1 marker, tracked in the CJC-1295 studies to tell the system switched on.
- Timing and how long it lasts — how a long-lasting GHRH copy works with the gland's natural burst pattern, a recurring theme in the CJC-1295 work.
- How picky ipamorelin is — its tidy growth-hormone-only profile compared with older, less selective signals.
Two things to keep in mind. First, most of this is older lab and animal research on each compound on its own — not the specific research-grade pair Peptora supplies. Second, these are simply descriptions of published findings — they are not promises that anything works, and nothing here describes or endorses use outside controlled research.
Purity and testing (why the certificate matters)
In research, your results are only as trustworthy as the material you start with. Every batch of CJC-1295 + Ipamorelin from Peptora is checked to 99%+ purity by HPLC, confirmed by a second test (LC-MS) that proves it's the right molecule, and run through a full quality-control panel before it ships. Every order comes with a certificate of analysis (COA) for that exact batch.
That paperwork is standard here, not an add-on. To learn what the numbers on a certificate actually mean, see the guide on purity and certificates of analysis and the testing standards overview.
How it's handled in the lab
The pair is supplied as a freeze-dried powder. Before it's used in research, it's mixed with bacteriostatic water — a special sterile water, sold separately. A little care keeps the peptides intact so the results stay reliable:
- 1Let the sealed vial warm up to room temperature before opening it.
- 2Add the water slowly down the side of the vial, then swirl gently — don't shake.
- 3Wait until the powder is fully dissolved before drawing anything out.
- 4Keep the mixed solution in the fridge, away from light.
Step-by-step details are in the reconstitution guide and the storage guide. Doing these the same way every time is one of the easiest ways to keep research consistent.
Scientific references
The sources below are here for background, from PubMed. They cover how-long-it-lasts, chemistry, and early animal research on CJC-1295 and ipamorelin — not the laboratory research product Peptora supplies. It's a summary of published findings, not medical advice.
- 1Teichman SL, Neale A, Lawrence B, et al. Prolonged stimulation of growth hormone (GH) and insulin-like growth factor I secretion by CJC-1295, a long-acting analog of GH-releasing hormone, in healthy adults. J Clin Endocrinol Metab. 2006;91(3):799-805. doi:10.1210/jc.2005-1536 (PMID: 16352683).
- 2Jetté L, Léger R, Thibaudeau K, et al. Human growth hormone-releasing factor (hGRF)1-29-albumin bioconjugates activate the GRF receptor on the anterior pituitary in rats: identification of CJC-1295 as a long-lasting GRF analog. Endocrinology. 2005;146(7):3052-3058. doi:10.1210/en.2004-1286 (PMID: 15817669).
- 3Alba M, Fintini D, Sagazio A, et al. Once-daily administration of CJC-1295, a long-acting growth hormone-releasing hormone (GHRH) analog, normalizes growth in the GHRH knockout mouse. Am J Physiol Endocrinol Metab. 2006;291(6):E1290-E1294. doi:10.1152/ajpendo.00201.2006 (PMID: 16822960).
- 4Raun K, Hansen BS, Johansen NL, et al. Ipamorelin, the first selective growth hormone secretagogue. Eur J Endocrinol. 1998;139(5):552-561. doi:10.1530/eje.0.1390552 (PMID: 9849822).
- 5Aagaard NK, Grøfte T, Greisen J, et al. Growth hormone and growth hormone secretagogue effects on nitrogen balance and urea synthesis in steroid treated rats. Growth Horm IGF Res. 2009;19(5):426-431. doi:10.1016/j.ghir.2009.01.001 (PMID: 19231263).
- 6Andersen NB, Malmlöf K, Johansen PB, et al. The growth hormone secretagogue ipamorelin counteracts glucocorticoid-induced decrease in bone formation of adult rats. Growth Horm IGF Res. 2001;11(5):266-272. doi:10.1054/ghir.2001.0239 (PMID: 11735244).
Explore research-grade CJC-1295 + Ipamorelin
99%+ pure, a certificate of analysis with every batch, fast U.S. shipping — for laboratory research use only.
View CJC-1295 + IpamorelinKey takeaways
- CJC-1295 + Ipamorelin is a research pair of two peptides that prompt the body's own growth hormone through two different "doors" — a GHRH copy and a different kind of signal.
- CJC-1295 is a lab-made GHRH copy with a trick that latches onto a blood protein, letting it last much longer — roughly 6–8 days in a human study.
- Ipamorelin is described as the first "selective" growth-hormone signal of its kind. It fits the ghrelin door and, unlike older signals, didn't noticeably raise stress hormones in the first study.
- The two are studied together because they open two separate doors that both lead to the same growth-hormone-making cells in the gland.
- Both are laboratory research compounds only. The underlying research describes older lab and animal findings on each compound, not the specific pair Peptora supplies, and makes no claims that anything works.
- Peptora's CJC-1295 + Ipamorelin is a freeze-dried powder, 99%+ pure (checked by HPLC and LC-MS) with a certificate of analysis, mixed with bacteriostatic water before it's used in the lab.
Frequently asked questions
This article is intended solely as an educational summary of publicly available scientific literature. Products offered by Peptora are supplied exclusively for laboratory research purposes and are not approved for human or veterinary use. The information presented should not be interpreted as medical advice, treatment recommendations, or clinical guidance.
