CJC-1295 With DAC vs No DAC: What Is the Difference?
The difference between CJC-1295 with DAC and CJC-1295 No DAC is the Drug Affinity Complex (DAC), which extends half-life. CJC-1295 with DAC has a long half-life producing sustained GH elevation, while CJC-1295 No DAC has a short half-life producing brief, pulsatile GH release that more closely mimics the body’s natural rhythm. No DAC is frequently paired with ipamorelin in research.
CJC-1295 is a GHRH analog studied as a growth-hormone secretagogue. It comes in two research forms — with DAC and No DAC — and the distinction comes down to half-life.
What does DAC mean?
DAC stands for Drug Affinity Complex. It binds to albumin in the bloodstream, dramatically extending the peptide’s half-life from minutes to days. This is the entire difference between the two forms.
Side-by-side comparison
| With DAC | No DAC | |
|---|---|---|
| Half-life | Long (days) | Short (minutes) |
| GH release pattern | Sustained elevation | Pulsatile (natural-like) |
| Typical research pairing | Standalone | Often with ipamorelin |
| Dosing frequency (research) | Infrequent | More frequent |
Which is studied for what?
CJC-1295 No DAC is studied where a short, pulsatile GH release is desired — closer to natural secretion — and is frequently combined with ipamorelin. The DAC version is studied where sustained GH elevation is the research objective.
Key takeaways
- DAC = Drug Affinity Complex, which dramatically extends half-life.
- With DAC: long half-life, sustained GH elevation.
- No DAC: short half-life, pulsatile GH release (mimics natural rhythm).
- No DAC is commonly paired with ipamorelin in research protocols.