CJC-1295 (No DAC) vs Ipamorelin: What Is the Difference?
They are studied together far more than against each other — two different doors into the same growth-hormone release.
Overview
CJC-1295 without DAC (also called Modified GRF 1-29) is a trimmed, stabilised piece of the natural growth-hormone-releasing hormone that acts at the GHRH receptor to prompt short, natural GH pulses.
Ipamorelin is a small, selective peptide that acts at a different receptor — the ghrelin receptor — to release growth hormone while leaving stress and hunger signals mostly alone.
The difference, without the jargon
This is a pair people ask to compare, but the honest answer is that they are usually combined, not chosen between. Each reaches growth-hormone release through a separate receptor, so putting them together lets researchers study two non-overlapping pathways at once. In handling they are close: both dissolve in plain bacteriostatic water, both go in the fridge after mixing. The small difference is that CJC's coil will foam if you shake it, so it wants a gentle swirl, while Ipamorelin is about as forgiving as a peptide gets — no light or oxygen sensitivity at all.
Common questions
Should I pick one or the other?
In the research literature they are typically studied together precisely because their mechanisms are complementary — a GHRH-receptor pathway and a ghrelin-receptor pathway — rather than as substitutes.
Is CJC-1295 no DAC the same as Modified GRF 1-29?
Yes, they are two names for the same short-acting, tetra-substituted GHRH(1-29) peptide.
Why does CJC-1295 foam and Ipamorelin does not?
CJC has a longer, coil-shaped structure that gathers at the liquid surface when agitated; a gentle swirl avoids it. Ipamorelin is a short, rigid peptide with no such tendency.
Technical reference below
How they actually differ
Two different doors to the same room. CJC-1295 without DAC works at the GHRH receptor, telling the pituitary to release growth hormone; Ipamorelin works at the ghrelin receptor to do the same thing through a separate pathway. Because the pathways do not overlap, research designs usually combine them rather than choose between them. In handling they are close cousins — both dissolve in plain water, both are refrigerated after mixing — though CJC's coil foams if shaken, while Ipamorelin is about as forgiving as peptides get.
CJC-1295 (No DAC) — origin
CJC-1295 without DAC is the first 29 residues of growth-hormone-releasing hormone carrying four stabilising substitutions (D-Ala2, Gln8, Ala15, Leu27) that resist DPP-4 cleavage. Omitting the Drug Affinity Complex — the albumin-binding element of the DAC version — gives it a short half-life, which is the property researchers study it for.
Ipamorelin — origin
Ipamorelin (Aib-His-D-2-Nal-D-Phe-Lys-NH2) is a pentapeptide ghrelin-receptor agonist. It was characterised as the first highly selective growth-hormone secretagogue — prompting GH release with minimal effect on cortisol, prolactin or appetite signalling, which is the property that keeps it in the research literature.
CJC-1295 (No DAC) research themes
Studied for prompting growth-hormone release in short, physiological pulses via the GHRH receptor.
The four substitutions are studied for extending the molecule beyond the minutes-long survival of native GHRH.
Frequently studied alongside ghrelin-receptor secretagogues such as Ipamorelin, which recruit a second GH-release pathway.
Ipamorelin research themes
Studied as a selective GHS-R agonist that releases GH with little effect on cortisol, prolactin or ACTH — the feature that distinguishes it from earlier GHRPs.
Examined for the shape and timing of growth-hormone release in research models.
Frequently combined with GHRH analogues such as CJC-1295 to study two GH-release pathways at once.
CJC-1295 (No DAC) handling
- Reach room temperature before opening.
- Swirl to dissolve; do not shake or vortex — foam indicates interfacial stress on the helix.
- Aliquot and refrigerate; never re-freeze reconstituted solution.
Ipamorelin handling
- Reach room temperature before opening.
- Swirl to dissolve; the peptide clears in seconds.
- Label aliquots with reconstitution date and diluent.
Both third-party tested
Every Popular Peptides batch of CJC-1295 (No DAC) and Ipamorelin is independently tested by HPLC and LC-MS with a published Certificate of Analysis. Enter a lot number to pull the COA for a specific vial.
CJC-1295 (No DAC) reference
Related comparisons
CJC-1295 (No DAC) and Ipamorelin are supplied strictly as research chemicals for in-vitro laboratory and research use only. They are not intended for human or animal consumption, diagnostic, or therapeutic use. This comparison summarizes published preclinical literature and laboratory handling data; it is not medical advice, not a claim of efficacy, and not usage guidance.