The GHRH + GHRP Stack: Why Ipamorelin + CJC-1295 Works
The Ipamorelin + CJC-1295 (no DAC) combination is the most prescribed growth hormone secretagogue stack in peptide therapy. This guide explains the synergistic mechanism, optimal timing, reconstitution, and what to expect.
Growth hormone (GH) release from the pituitary requires two signals: a GHRH signal (amplitude) and a GHRP signal (initiation). Using one type alone produces results — using both together produces 2-5× greater output.
Understanding Synergy: GHRH vs GHRP
GHRH (Growth Hormone Releasing Hormone) — represented by CJC-1295 — amplifies the size of each GH pulse. It acts on pituitary somatotrophs to increase the amplitude of GH release. Think of it as turning up the volume.
GHRP (Growth Hormone Releasing Peptide) — represented by Ipamorelin — initiates GH pulses by activating the ghrelin receptor (GHS-R1a). It triggers the pituitary to fire a GH pulse. Think of it as pressing the play button.
Combined: CJC-1295 + Ipamorelin = pressing play AND turning up the volume simultaneously. Research shows this combination produces GH output that exceeds either peptide alone by 2-5×.
Why Ipamorelin Over Other GHRPs
Ipamorelin is the cleanest GHRP available. Unlike GHRP-6 (strong appetite stimulation), GHRP-2 (moderate cortisol/prolactin elevation), and Hexarelin (desensitization after 4 weeks), Ipamorelin has:
• Minimal cortisol elevation — no significant stress hormone impact
• Minimal prolactin elevation — no hormonal side effects
• No appetite stimulation — unlike GHRP-6 which causes intense hunger
• No desensitization — unlike Hexarelin, can be used continuously
This selective profile makes Ipamorelin the gold standard for long-term GH secretagogue use.
CJC-1295 With DAC vs Without DAC
CJC-1295 with DAC has a 5.8-8 day half-life — it keeps GH elevated continuously. This is convenient (fewer injections) but creates a non-physiological, sustained GH level that can increase side effects.
CJC-1295 without DAC (Mod GRF 1-29) has a ~30-minute half-life. It creates sharp, discrete GH pulses that closely mimic natural physiology. This is why Mod GRF is preferred for the Ipamorelin stack — it produces natural-pattern GH release.
Bottom line: For the Ipamorelin stack, use CJC-1295 WITHOUT DAC (Mod GRF 1-29).
Dosing Protocol
Standard Protocol: 100-300 mcg of each peptide, combined in one injection or injected separately.
Timing: 1-3× daily — most commonly before bed and/or upon waking.
Critical rules: (1) Empty stomach — no food for 1 hour before and 30 minutes after injection. Insulin blunts GH release. (2) Before bed is optimal — aligns with the natural nocturnal GH surge. (3) Fasted morning is the second-best window.
Reconstitution: For a pre-mixed 9 mg vial (e.g., 6 mg CJC-1295 + 3 mg Ipamorelin) with 3 mL BAC water: concentration = 3 mg/mL = 3,000 mcg/mL. Each 10 units on a 100-unit syringe = 300 mcg total.
Use our Reconstitution Calculator to calculate exact syringe units for your specific vial concentration.
Results Timeline
Weeks 1-2: Improved sleep quality (especially deep sleep) and vivid dreams. This is the earliest and most consistent effect.
Weeks 2-4: Recovery from workouts improves noticeably. Mild improvements in skin quality and hair texture.
Weeks 4-8: Body composition changes begin — decreased body fat percentage, increased lean mass. Improved joint mobility.
Weeks 8-12: Full body recomposition effects. Improved exercise capacity, visible changes in muscle tone and fat distribution.
Months 3-6: Maximum benefits including hair and nail growth, skin elasticity improvement, and sustained body composition optimization.