CJC-1295 with DAC vs Without DAC: What Researchers Should Know
Understanding the Difference Between These Growth Hormone Research Peptides
Short answer: Both are synthetic GHRH analogues. The DAC version binds albumin and has a half-life of several days, while the version without DAC (Mod GRF 1-29) lasts about 30 minutes and is studied for pulsatile release patterns.
Last updated: 20 October 2026
Introduction
CJC-1295 is a synthetic analog of Growth Hormone-Releasing Hormone (GHRH) that exists in two forms: with DAC (Drug Affinity Complex) and without DAC. Understanding the distinction between these two variants is essential for researchers studying growth hormone signaling pathways.
What Is CJC-1295?
CJC-1295 is a modified GHRH analog designed to potentially increase the half-life of the naturally occurring hormone. The modification involves substituting certain amino acids to enhance stability.
Base properties:
- Synthetic GHRH analog
- 30 amino acids (modified)
- Studied for growth hormone release potential
With DAC vs Without DAC
CJC-1295 WITH DAC
The DAC (Drug Affinity Complex) is a chemical group that binds to albumin proteins in the blood. This binding is considered to significantly extend the peptide’s half-life.
Key properties:
- Half-life: potentially several days
- Less frequent dosing in research models
- More sustained GH release patterns
- DAC binds to serum albumin
CJC-1295 WITHOUT DAC (also called Mod GRF 1-29)
Without the DAC, the peptide has a much shorter half-life and is considered to produce more pulsatile GH release.
Key properties:
- Half-life: approximately 30 minutes
- More natural, pulsatile GH patterns
- Requires more frequent dosing
- Considered more physiological
Applications de recherche
Both variants are studied for:
- Growth hormone signaling
- Endocrine research
- Metabolic studies
- Comparative studies between sustained and pulsatile GH release
Conclusion
The choice between CJC-1295 with and without DAC depends on the research question being asked. Researchers studying sustained GH release may prefer the DAC variant, while those investigating natural pulsatile patterns may opt for the version without DAC.
Europeptide offers CJC-1295 No DAC at 99% purity, third-party tested, with fast EU shipping.
Questions fréquentes
What does DAC stand for?
Drug Affinity Complex – a chemical group that binds to albumin in the blood and extends half-life.
What is CJC-1295 without DAC also called?
Mod GRF 1-29.
How do researchers choose between them?
Studies of sustained GH release tend to use the DAC variant; studies of natural pulsatile patterns tend to use the version without DAC.
Related: CJC-1295 No DAC · Ipamorelin · Lab reports (COA)