GHRP-2 vs GHRP-6
Two first-generation ghrelin-receptor peptides. GHRP-2 is the more characterized and more aggressive releaser; GHRP-6 is the one defined by how hungry it makes you.
GHRP-2
Pralmorelin
Genuinely raises GH (and is an approved diagnostic in Japan), but the same dose lifts cortisol, prolactin and appetite, and desensitizes — no anti-aging outcomes.
Full GHRP-2 evidence reviewGHRP-6
Pulses GH short-term, but its most reliable real-world effect is a surge in appetite; no long-term human outcomes and not approved.
Full GHRP-6 evidence reviewSide by side
| GHRP-2 | GHRP-6 | |
|---|---|---|
| Marketed for | Muscle, 'anti-aging' | Muscle, recovery, 'anti-aging' |
| Evidence grade | Clinical data | Clinical data |
| Family | GH axis | GH axis |
| Regulatory status | Not FDA-approved | Not FDA-approved |
| How it's obtained | Research-only | Research-only |
| Key human source | Bowers, Endocrine 2001 | Jaffe, JCEM 1993 |
marks a row where the two differ. Evidence grades come from our evidence matrix, which grades each molecule on the human data for the use it is marketed for.
Our verdict
GHRP-2 has the stronger human record: reproducible acute GH increases, a multicenter stimulation-test study, and diagnostic approval in Japan. GHRP-6's human data is older but real, showing GH release across intravenous, subcutaneous, intranasal and oral routes. Both come bundled with adrenal spillover, with GHRP-2 generally regarded as the more aggressive ACTH and cortisol releaser, and both drive appetite; GHRP-6's orexigenic effect is its signature. Neither is approved for body composition or anti-aging, both are sold as gray-market research peptides, and no multi-week outcome trials have been run for either.
GHRP-2 fits if
GHRP-2 fits the reader who wants the best-documented GHRP, particularly its validated role as a short-acting probe of pituitary GH output.
GHRP-6 fits if
GHRP-6 is the one to study if you are interested in ghrelin-driven appetite biology or the preclinical cytoprotection thread, keeping in mind its wound and heart findings are rodent-level.
Where to get it
Where to get peptide therapy
Clinician-led telehealth services that prescribe compounded peptides. The specific peptides offered vary by provider — confirm GHRP-2 availability before ordering.
