What is a CJC peptide?
"CJC peptide" almost always means CJC-1295 — a lab-made version of growth hormone-releasing hormone (GHRH). Natural GHRH breaks down in minutes. CJC-1295 is built to resist that breakdown, which is the entire point of the molecule: same signal, much longer window.
CJC-1295 with DAC vs. without DAC
DAC ("Drug Affinity Complex") locks the peptide onto albumin in the blood, stretching its active life from minutes to days. Skip the DAC and you get "Mod GRF 1-29" — active for about 30 minutes, much closer to how the body's own GHRH behaves. That's the version almost always chosen for pairing with Ipamorelin, for one simple reason: it keeps the pulse natural instead of flooding the system continuously.
CJC-1295 / Ipamorelin, ≥99% purity, independent COA on every lot. This is where our own research team sources it.
Why CJC-1295 is so often paired with Ipamorelin
CJC-1295 and Ipamorelin hit two different switches: CJC-1295 triggers the GHRH receptor, Ipamorelin triggers the separate ghrelin (GHRP) receptor. Push both at once and the GH pulse that follows is bigger and more synchronized than either compound produces solo — this is one of the more consistently replicated findings across secretagogue-combination studies.
Why people research CJC-1295 and Ipamorelin
Three groups make up most of the interest here, and it's worth being direct about what each one is actually chasing. Longevity researchers point to the natural decline in GH output with age, and study whether restoring a more youthful pulse pattern shows up in body composition, skin quality, or sleep. Recovery-focused researchers are drawn to GH's documented role in tissue repair, and study its effect on turnaround time between training sessions. And body-composition research keeps circling back to the same two levers: fat metabolism and lean mass retention — the two effects of GH that show up most consistently across the literature on this pair.
What the research literature says
Published research on GHRH analogs and ghrelin-mimetic secretagogues spans several decades, largely centered on their potential in models of GH deficiency and age-related GH decline. As with any research compound, findings from animal or in-vitro models don't automatically generalize to other contexts.
Reading a certificate of analysis (COA)
A trustworthy COA states the testing method (typically HPLC and mass spectrometry), the exact purity percentage measured, the lot number, and the identity of the testing laboratory. Always cross-check the lot number printed on the vial against the COA published by the supplier — a mismatch is the clearest red flag of an unverified source.