Source comparison
Dosing Protocols: Single-Dose vs Multi-Dose Strategies
The 100–200mcg dose range isn't arbitrary. It reflects the threshold at which GHRH receptor agonism saturates without triggering negative feedback suppression. Research published in the European Journal of Endocrinology demonstrated that CJC-1295 no DAC at 100
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- The 100–200mcg dose range isn't arbitrary. It reflects the threshold at which GHRH receptor agonism saturates without triggering negative feedback suppression. Research published in the European Journal of Endocrinology demonstrated that CJC-1295 no DAC at 100mcg per dose produced mean GH amplitude increases of 2.8-fold over baseline, while 300mcg doses produced only 3.1-fold increases. A marginal gain that comes with significantly higher desensitisation risk. The dose-response curve flattens sharply above 200mcg because pituitary somatotrophs have a finite secretory capacity per pulse.
- Single daily dosing at 200–300mcg exploits the morning cortisol-GH synergy window but leaves 16+ hours without GH amplification. Multi-dose protocols. 100mcg upon waking, 100mcg pre-training, 100mcg before sleep. Sustain elevated GH across three endogenous pulse windows. The pre-sleep dose is particularly critical: nocturnal GH secretion accounts for 60–70% of daily GH output, and amplifying this pulse produces the most significant anabolic signalling. Researchers using single daily doses typically report subjective recovery improvements but minimal lean mass accrual; multi-dose protocols show measurable body composition shifts within 8–12 weeks when paired with resistance training.
- Timing precision matters more than most guides acknowledge. Inject CJC-1295 no DAC 15–30 minutes before an anticipated GH pulse. Not during one. The compound requires 20–25 minutes to achieve peak plasma concentration and GHRH receptor occupancy. Injecting mid-pulse means the endogenous secretion has already begun before receptor agonism peaks, wasting the amplification window. For the morning dose, inject immediately upon waking (before food); for the pre-training dose, inject 20–30 minutes before the first working set; for the pre-sleep dose, inject 45–60 minutes before lights out to align with the first nocturnal pulse.