GHRP-2 vs GHRP-6
Research Verdict
Neither compound has a universal evidence advantage. Both peptides serve distinct research goals with comparable evidence; choose by target mechanism.
Quick Answers
Which is better, GHRP-2 or GHRP-6?
Neither compound has a universal evidence advantage. Both peptides serve distinct research goals with comparable evidence; choose by target mechanism.
What is the key difference between GHRP-2 and GHRP-6?
GHRP-2 produces more GH per unit dose with less appetite stimulation and cortisol release; GHRP-6 has stronger appetite-stimulating (orexigenic) effects via ghrelin receptor activation - the side effect profile is the key practical distinction.
Evidence Comparison
GHRP-2: stronger GH secretion per dose in comparative studies (Bowers 1991), less appetite stimulation than GHRP-6. GHRP-6: well-characterized appetite-stimulating ghrelin receptor activity, more published pharmacological data. Neither has clinical approval; both have comparable but incomplete human pharmacokinetic data.
Evidence Context Favoring GHRP-2
GH secretagogue research requiring maximal GH output with minimal appetite and cortisol side effects.
Evidence Context Favoring GHRP-6
Research where appetite stimulation is desirable (cachexia, wasting models), or where GHRP-6 pharmacology is specifically being studied.
Side-by-Side Snapshot
| Evidence grade | GHRP-2: Level C GHRP-6: Level C |
|---|---|
| Research status | GHRP-2: Preclinical GHRP-6: Preclinical |
| Primary category | GHRP-2: Growth Hormone GHRP-6: Growth Hormone |
| Cited studies | GHRP-2: 2 GHRP-6: 2 |