Home Research Comparisons GHRP-6 vs GHRP-2
Executive Summary
GHRP-6 and GHRP-2 are both hexapeptide growth hormone releasing peptides that stimulate GH release through the ghrelin receptor (GHS-R1a), but differ significantly in selectivity and side effect profiles. GHRP-6 is the original GHRP with potent but non-selective effects—producing intense hunger (ghrelin-like effect), cortisol elevation, and prolactin increase alongside GH release. GHRP-2 represents an improvement with greater GH potency and reduced off-target effects, though still less selective than the newer Ipamorelin. For pure GH research without confounding variables, Ipamorelin is preferred; for appetite stimulation research, GHRP-6 is unique.
Peptide Profiles
Head-to-Head Comparison
Property GHRP-6 GHRP-2 Drug Class Growth Hormone Releasing Peptide Growth Hormone Releasing Peptide Molecular Formula C46H56N12O6 C45H55N9O6 Sequence Length 6 amino acids 6 amino acids GH Release Potency High Highest among GHRPs Appetite Stimulation Very strong (ghrelin-like) Moderate Cortisol Increase Significant Mild to moderate Prolactin Increase Significant Mild Selectivity Low (multiple effects) Moderate (more selective) Half-Life ~20-30 minutes ~20-30 minutes Historical Status First-generation GHRP Second-generation GHRP