Source comparison
Half-Life of Sermorelin: Comparison with Other GH Secretagogues
Sermorelin (GRF 1-29) 10–20 minutes GHRH receptor agonist; triggers pulsatile GH release from pituitary Once daily (bedtime preferred) Shortest half-life but effective for mimicking natural GH pulses. Best for preserving physiological rhythm and receptor sensi
This comparison does not assign a generated winner or score.
- Sermorelin (GRF 1-29)
- 10–20 minutes
- GHRH receptor agonist; triggers pulsatile GH release from pituitary
- Once daily (bedtime preferred)
- Shortest half-life but effective for mimicking natural GH pulses. Best for preserving physiological rhythm and receptor sensitivity.
- CJC-1295 (no DAC)
- ~30 minutes
- GHRH receptor agonist; similar to sermorelin but slightly more stable
- 1–3 times per week
- Marginally longer half-life than sermorelin. Allows less frequent dosing while maintaining pulsatile pattern.
- CJC-1295 with DAC
- 6–8 days
- GHRH receptor agonist with albumin binding via Drug Affinity Complex
- Once per week
- Extended half-life produces continuous low-level GH elevation rather than pulses. May cause receptor desensitization over time.
- Ipamorelin
- ~2 hours
- Ghrelin receptor agonist (growth hormone secretagogue receptor, GHSR)
- 1–2 times daily
- Longer functional window than sermorelin. Often stacked with GHRH analogues for synergistic effect.
- GHRP-2
- ~30 minutes (plasma)
- Ghrelin receptor agonist; stimulates appetite and GH release
- 1–3 times daily
- Similar kinetics to sermorelin but works through different receptor. Appetite stimulation limits use in some populations.
- Sermorelin's position in this comparison highlights the trade-off between half-life and receptor dynamics. Longer half-life compounds reduce injection frequency but may compromise the pulsatile secretion pattern that defines healthy GH physiology. For researchers prioritizing circadian alignment and long-term receptor health, sermorelin's brief plasma presence is a feature, not a limitation.