Source comparison
Sermorelin vs GH: Research Comparison
Mechanism Stimulates pituitary GHRH receptors to release endogenous GH in pulses Directly replaces GH; bypasses pituitary Sermorelin preserves regulatory feedback; GH does not GH Release Pattern Pulsatile (mimics natural circadian rhythm) Continuous elevation
This comparison does not assign a generated winner or score.
- Mechanism
- Stimulates pituitary GHRH receptors to release endogenous GH in pulses
- Directly replaces GH; bypasses pituitary
- Sermorelin preserves regulatory feedback; GH does not
- GH Release Pattern
- Pulsatile (mimics natural circadian rhythm)
- Continuous elevation (non-physiological)
- Pulsatile release maintains receptor sensitivity
- IGF-1 Increase
- 25–40% above baseline (within physiological range)
- 100–200% or higher (supraphysiological)
- Sermorelin stays within normal IGF-1 range
- Pituitary Suppression
- None. Works through existing pathways
- Severe. Negative feedback shuts down endogenous GH
- Sermorelin can be stopped without prolonged suppression
- Half-Life
- 10–15 minutes (GH release lasts 2–4 hours)
- 3–5 hours (rhGH formulations)
- Short half-life prevents receptor downregulation
- Regulatory Status
- Prescription-only (not FDA-approved for anti-aging)
- Prescription-only (FDA-approved for GH deficiency only)
- Both require medical oversight; neither approved for anti-aging