Understand the source comparison
Comparison: GHRP vs GHRH Analog vs Dietary Peptides
GHRPs (GHRP-2, hexarelin, ipamorelin) Ghrelin receptor (GHS-R1a) agonism. Stimulates Gq signaling cascade in pituitary somatotrophs 200–400% above baseline within 30–45 minutes 20–30 minutes (acute pulse) High. D-Trp motif required for binding pocket fit Demon
No winner is assigned.
This page preserves a source comparison for education. It does not add a rating, recommendation or clinical judgment.
- GHRPs (GHRP-2, hexarelin, ipamorelin)
- Ghrelin receptor (GHS-R1a) agonism. Stimulates Gq signaling cascade in pituitary somatotrophs
- 200–400% above baseline within 30–45 minutes
- 20–30 minutes (acute pulse)
- High. D-Trp motif required for binding pocket fit
- Demonstrated efficacy in controlled trials; requires subcutaneous administration and precise timing
- GHRH analogs (sermorelin, CJC-1295)
- GHRH receptor agonism. Amplifies endogenous GH pulse amplitude during natural secretion windows
- 250–350% above baseline during nocturnal pulses
- Sermorelin: 10–12 min; CJC-1295 DAC: 6–8 days
- High. Must mimic N-terminal GHRH sequence for receptor activation
- Works synergistically with natural pulse rhythm; CJC-1295 provides sustained multi-day effect vs sermorelin's single-pulse action
- Dietary peptides (collagen, whey fragments, plant hydrolysates)
- No receptor binding. Metabolized as amino acids
- No measurable GH change in systematic reviews
- N/A (digested to amino acids)
- Zero. Random sequences lack structural homology to ghrelin or GHRH
- No evidence of GH effect; marketed based on 'peptide' terminology rather than pharmacology
- Combination protocols (GHRP + GHRH analog)
- Dual receptor activation. Ghrelin mimicry + GHRH amplification create synergistic pulse
- 400–600% above baseline (greater than either alone)
- Depends on specific peptides used
- High for both components
- Clinical data supports additive effect; ipamorelin + CJC-1295 is the most studied combination