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Ipamorelin and CJC-1295 - pre-bed or post-workout? With food?

Updated 2026-05-02

Empty stomach. At minimum 2 hours after your last meal with carbs or fat. Pre-bed is the most common protocol because it stacks the peptide-induced GH pulse with your body's natural overnight GH pulse. Why empty stomach matters: food raises insulin, and insulin is physiologically opposite to growth hormone. CJC-1295 without DAC is especially sensitive to this timing. CJC-1295 with DAC has a much longer half-life (5 to 8 days) so timing is less critical. Wait 30 to 60 minutes after injecting before eating.

IfIf you ate a carb-heavy meal in the last hour
Thenthen skip the dose and take it at the next fasted window - insulin will blunt the response
IfIf you want the biggest GH pulse
Thenthen pre-bed on an empty stomach is the gold standard
IfIf you do morning fasted cardio
Thenthen injecting before the session stacks the peptide GH pulse with exercise-induced GH release
IfIf you're using CJC with DAC
Thenthen timing is less critical, but a low-carb evening meal still helps overall GH release
Key facts
  • Empty stomach: minimum 2 to 3 hours after last carb-containing meal
  • Mechanism: dietary carbs raise insulin; insulin suppresses GH release and promotes somatostatin (a GH inhibitor)
  • Wait 30 to 60 minutes after injection before eating
  • CJC-1295 without DAC (Mod GRF 1-29): half-life about 30 minutes, sharp pulse, timing is critical
  • CJC-1295 with DAC: half-life 5.8 to 8 days, sustained GH elevation, less timing-sensitive
  • Ipamorelin: a GHRP that acts on the ghrelin receptor (GHSR); 100 to 300 mcg per injection; selective GH release without cortisol or prolactin elevation per Raun et al. 1998
  • Combined CJC + ipamorelin: CJC amplifies pulse size; ipamorelin widens the number of pituitary cells releasing GH
  • Ionescu and Frohman 2006: CJC-1295 preserved pulsatile GH secretion with markedly increased trough levels in healthy human adults
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