Understand the source comparison
GHRP-6 Acetate vs Sermorelin: Clinical Comparison
Primary Mechanism Direct ghrelin receptor (GHS-R1a) agonism → immediate GH release independent of GHRH GHRH receptor activation → amplifies natural pulsatile GH only when hypothalamus permits GHRP-6 for on-demand stimulation; sermorelin for circadian rhythm pr
No winner is assigned.
This page preserves a source comparison for education. It does not add a rating, recommendation or clinical judgment.
- Primary Mechanism
- Direct ghrelin receptor (GHS-R1a) agonism → immediate GH release independent of GHRH
- GHRH receptor activation → amplifies natural pulsatile GH only when hypothalamus permits
- GHRP-6 for on-demand stimulation; sermorelin for circadian rhythm preservation
- GH Peak Timing
- 20–30 minutes post-injection, predictable regardless of circadian timing
- 30–60 minutes, amplitude depends on endogenous pulse status
- GHRP-6 offers timing-independent consistency
- Typical Effective Dose
- 100–200 mcg subcutaneous, 1–3× daily
- 200–500 mcg subcutaneous, typically before bed to align with nocturnal GH pulse
- Sermorelin requires higher mcg amounts but produces physiological amplification
- Appetite Effect
- Moderate to strong hunger stimulation 15–30 min post-dose (ghrelin mimicry)
- None. No orexigenic signaling
- GHRP-6 contraindicated when appetite increase is undesirable
- Synergy Potential
- 3–5× GH amplification when stacked with GHRH analogs like sermorelin
- 3–5× GH amplification when stacked with GHRPs like GHRP-6
- Stacking both produces the highest research-grade GH output
- Desensitization Risk
- Moderate. 20–40% response reduction after 8+ weeks continuous use
- Low. Physiological amplification preserves receptor sensitivity longer
- Sermorelin better suited for protocols >12 weeks