Source comparison
CJC-1295 No DAC vs DAC: Comparison
Before selecting a variant, understand what the Drug Affinity Complex modification actually does. Serum Half-Life 30 minutes 6–8 days No DAC mimics endogenous GHRH clearance; DAC extends circulation via albumin binding GH Elevation Duration 90–120 minutes 5–7
This comparison does not assign a generated winner or score.
- Before selecting a variant, understand what the Drug Affinity Complex modification actually does.
- Serum Half-Life
- 30 minutes
- 6–8 days
- No DAC mimics endogenous GHRH clearance; DAC extends circulation via albumin binding
- GH Elevation Duration
- 90–120 minutes
- 5–7 days continuous
- No DAC produces discrete pulses; DAC produces sustained pharmacological elevation
- Injection Frequency
- Multiple daily (every 3–6 hours for pulsatile protocols)
- Once weekly
- No DAC requires protocol-driven timing; DAC eliminates timing considerations
- Pulsatile Secretion Pattern
- Preserved. Matches physiological GH pulses
- Abolished. Creates continuous low-level GH elevation
- Pulsatility matters for IGF-1 synthesis efficiency and receptor sensitivity
- Research Applications
- Acute GH dynamics, pulsatile neuroendocrine studies, receptor kinetics
- Chronic GH exposure models, sustained anabolic studies
- No DAC for short-acting; DAC for long-acting continuous exposure
- Reconstituted Stability
- 28 days at 2–8°C
- Both degrade identically once in solution. The DAC modification affects in-vivo kinetics, not in-vitro stability
- The bottom line: CJC-1295 with DAC is not a 'better version' of No DAC. It's a fundamentally different tool. The DAC modification (a reactive chemical group that binds covalently to serum albumin) extends circulatory half-life by preventing renal clearance. This makes it useful for protocols requiring sustained GH elevation across days, but it completely eliminates the pulsatile secretion architecture that defines endogenous GH physiology. For short-acting GHRH research replicating natural hypothalamic-pituitary dynamics, No DAC is the correct choice.