CJC-1295 DAC + Ipamorelin: The Long-Acting Blend Explained
Also known as: CJC-1295 DAC + Ipamorelin · CJC DAC + Ipa · Long-acting CJC + Ipamorelin
This blend pairs the DAC version of CJC-1295 — half-life roughly 6–8 days — with ipamorelin, whose half-life is about two hours. That mismatch is the entire story of this product. The DAC version holds GH elevated continuously rather than in pulses, which is a fundamentally different strategy from the no-DAC blend, and putting a 2-hour peptide in the same fixed-ratio vial as a week-long one means you cannot dose either on its own sensible schedule. There is no research on this combination as formulated. Educational only, not medical advice.
What DAC changes
DAC (Drug Affinity Complex) is a chemical modification that lets CJC-1295 bind to albumin in the blood, protecting it from breakdown and stretching its half-life from about 30 minutes to roughly 6–8 days. That single change turns a pulse-mimicking peptide into a continuous one.
This matters because natural GH release is pulsatile — sharp bursts, mostly at night, separated by low troughs. There is a reasonable argument that the trough periods are part of how the system works, and that holding GH elevated around the clock is a different physiological state than amplifying the natural rhythm. The no-DAC version tries to mimic the pulse. The DAC version deliberately does not.
Neither approach has been shown superior for the outcomes people buy these for. But they are not interchangeable, and a vial labelled just "CJC-1295" leaves the most important variable unstated.
The half-life mismatch problem
In a fixed-ratio blend, every injection delivers both peptides in the same proportion. Ipamorelin, cleared in a couple of hours, is typically dosed daily or more often. CJC-1295 DAC, lasting the better part of a week, needs roughly weekly dosing.
You cannot satisfy both schedules from one vial. Dose it daily for the ipamorelin and CJC-1295 DAC accumulates well past a typical weekly amount. Dose it weekly for the CJC-1295 and the ipamorelin contributes almost nothing on the other six days. This is a structural property of the product, not a dosing error, and it is the main reason the no-DAC pairing is more common.
Anyone genuinely wanting both compounds on their own schedules needs them as separate vials — which is the trade-off a pre-mixed blend removes.
What is actually known
The GHRH-plus-GHRP synergy that justifies pairing a CJC with a GHRP is documented in human research and applies here in principle. This specific combination has not been studied — not the ratio, not the schedule, not long-term use.
Sustained rather than pulsatile GH elevation is also the pattern more associated with the classic GH side-effect profile: water retention, joint aches, carpal-tunnel-type symptoms, and reduced insulin sensitivity. Fasting glucose and IGF-1 are the two things worth trending if you are on a long-acting GH peptide at all.
How to track CJC-1295 DAC + Ipamorelin in Stackeddd
Log the actual injection days rather than an intended schedule — with a week-long half-life the accumulation between doses is the thing that matters, and a missed or doubled dose changes your exposure for days rather than hours.
Model it yourself · free, no account
Blood-Level Simulator
See the mismatch for yourself: model a ~7-day half-life against a ~2-hour one at the same dosing frequency and the reason this blend is awkward becomes obvious on the chart.
Related compounds
Related reading: Injection frequency: daily vs EOD vs weekly · What peptides can you mix in the same syringe?
Frequently asked questions
What is the difference between CJC-1295 with and without DAC?
Half-life, and therefore strategy. Without DAC it is roughly 30 minutes, producing a short pulse similar to natural GH release. With DAC it binds to albumin and lasts about 6–8 days, holding GH elevated continuously. They are different approaches, not different strengths of the same thing.
Why is the DAC blend considered awkward to dose?
Because the two components have wildly different half-lives locked into one fixed ratio. Ipamorelin clears in about two hours and is normally dosed daily; CJC-1295 DAC lasts most of a week. Whichever schedule you pick, one component is being dosed wrongly for its own pharmacology.
Is a long-acting GH peptide better than a pulsatile one?
It has not been demonstrated either way for the outcomes people use these for. What is reasonably established is that continuous GH elevation is the pattern more associated with the classic GH side effects — fluid retention, joint discomfort, and reduced insulin sensitivity.
This is educational information, not medical advice. Doses and protocols above reflect published references and community practice — protocol decisions belong with your prescribing physician. Generic names used throughout. How this reference is built & how the AI is tested →
STACKEDDD
Track it instead of guessing.
Doses, reconstitution, bloodwork, and an AI coach grounded in your own data — free to start, on the App Store and Google Play.