The CJC-1295 + Ipamorelin combination is the most widely used growth hormone peptide stack in the research community. It combines a GHRH analog (CJC-1295) that amplifies GH pulse amplitude with a selective GHRP (Ipamorelin) that triggers the pulse — resulting in synergistic GH release that can exceed 3-4x baseline.
Why This Stack Works
Growth hormone is released in pulses from the pituitary. Two separate receptors control this: GHRH receptors (stimulated by CJC-1295) set the size of each GH pulse, and GHRP receptors / ghrelin receptors (stimulated by Ipamorelin) trigger the pulse to release.
Using both simultaneously produces GH release that is synergistically greater than either alone — each plays a different role in the same final event.
CJC-1295 with DAC vs Without DAC
CJC-1295 with DAC (Drug Affinity Complex): Half-life of ~8 days. Produces continuous GH elevation. Less physiological — maintains constantly elevated GH rather than pulsatile release.
CJC-1295 without DAC (Mod GRF 1-29): Half-life of ~30 minutes. Must be dosed with Ipamorelin at the same time. More physiological — mimics the body's natural pulsatile GHRH secretion.
Most protocols use CJC-1295 without DAC for its more natural hormone profile.
Ipamorelin: Why It's Preferred
Ipamorelin is the most selective GHRP available. Unlike GHRP-6 (which strongly increases appetite) or GHRP-2 (which elevates cortisol and prolactin), Ipamorelin selectively stimulates GH release with minimal cortisol, prolactin, or ACTH elevation.
This clean profile makes it the preferred GHRP in most research stacks and allows for longer cycle durations without cortisol-related side effects.
Protocol and Dosing
Standard Protocol:
- CJC-1295 No DAC: 100mcg per injection
- Ipamorelin: 100-200mcg per injection
- Frequency: 2-3x per day (most commonly before bed and morning fasted)
- Timing: Inject at least 2 hours after last meal for maximum GH release
Cycle length: 3-6 months continuous, with 1-2 month breaks
Before bed is the most important dose — it amplifies the body's largest natural GH pulse that occurs during deep sleep (1-2 hours after sleep onset).
Expected Effects Timeline
Weeks 1-2: Improved sleep quality, deeper sleep, more vivid dreams
Weeks 3-4: Noticeable recovery improvement, reduced DOMS
Weeks 6-8: Body composition changes begin — fat loss and muscle fullness
Weeks 12+: Significant skin quality improvement, sustained body recomposition
The effects are gradual and cumulative — this is not a dramatic acute compound. Results build over months rather than weeks.
Key Takeaways
CJC-1295 + Ipamorelin is the best evidence-based starting point for GH optimization through peptides. It's physiological, selective, and well-tolerated. The key to results is consistency — multiple injections daily for months, not a short course.