CJC-1295 and Ipamorelin: Why the Pairing Exists and What the Vial Math Looks Like

CJC-1295 and ipamorelin are paired because they act on two different receptors. CJC-1295 is a GHRH analogue working through the GHRH receptor; ipamorelin works through the ghrelin receptor. The rationale is complementary stimulation, not more of the same signal.

One detail decides almost everything about how a blend behaves, and most product listings mention it only in passing: whether the CJC-1295 includes DAC.

The DAC distinction

DAC stands for Drug Affinity Complex — a modification that binds the peptide to albumin in the bloodstream, dramatically extending how long it circulates.

Blends sold for research overwhelmingly use the no-DAC form precisely because the short half-life matches ipamorelin's. If a vendor cannot tell you which one you are buying, that is information about the vendor.

Why the pairing is proposed

The two receptors sit on different pathways into the same output. CJC-1295 increases the amplitude of GH pulses through the GHRH pathway; ipamorelin prompts release through the ghrelin pathway while — per the research on its selectivity — avoiding the cortisol and prolactin rises of older secretagogues.

The mechanistic rationale is coherent. What does not exist is a controlled human trial showing the combination outperforms either component alone, and that gap should be stated plainly rather than glossed over.

Blend vial math

Blends are usually labelled as a combined total, which creates the same ambiguity as any blended vial: is a "10 mg blend" 5 mg of each, or 10 mg of each? Resolve that before adding water.

A 2 mg CJC-1295 + 5 mg ipamorelin vial

The constraint of any blend applies here too: a single draw delivers both in a fixed ratio, set by the vendor rather than by you. Separate vials cost more but allow each component to vary independently. The peptide calculator supports per-component concentrations for blend vials, and the BPC-157 and TB-500 guide works through the same labelling trap in more detail.

Frequently asked questions

Is Mod GRF 1-29 the same as CJC-1295 without DAC?

Yes — the names are used interchangeably for the same modified GHRH fragment. Listings may use either.

Why do half-life figures differ so much between sources?

Because the two forms are constantly conflated. A source quoting days is describing the DAC version; one quoting minutes is describing the no-DAC version. Both can be correct about different molecules.

Does the blend need refrigeration?

Once reconstituted, yes — 2–8 °C, never frozen, bounded by the shorter of peptide stability and the 28-day bacteriostatic water limit. See the bacteriostatic water guide.