GHRP-2 vs Sermorelin
Two different doors to the same growth-hormone pulse, a ghrelin-receptor agonist versus a GHRH analog. The gap that matters is selectivity and regulatory standing.
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 reviewSermorelin
Geref
A former FDA-approved GHRH analog (now compounded); real GH-axis data, no anti-aging outcome evidence.
Full Sermorelin evidence reviewSide by side
| GHRP-2 | Sermorelin | |
|---|---|---|
| Marketed for | Muscle, 'anti-aging' | GH deficiency, '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 | Compounded |
| Key human source | Bowers, Endocrine 2001 | BioDrugs review, 1999 |
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
Sermorelin is the better-grounded of the two. It is a GHRH analog with a documented clinical record in the diagnosis and treatment of idiopathic growth-hormone deficiency in children; the branded injectable was later discontinued for commercial reasons and it is now supplied largely through compounding pharmacies, which makes it a clinician's decision rather than a self-directed one. Its longevity use is still weak, resting on biomarker effects and a few targeted trials rather than healthspan outcomes. GHRP-2 works through the ghrelin receptor instead, is an approved diagnostic agent in Japan and not FDA-approved for body composition or anti-aging, and its GH pulse comes bundled: the same dose raises cortisol, ACTH and prolactin and increases appetite, the response attenuates with repeated dosing, and a five-day course in healthy men did not raise IGF-1. They have not been compared directly for any body-composition endpoint, and neither has outcome data for muscle or aging.
GHRP-2 fits if
GHRP-2 matters mainly to the reader who wants to understand a validated short-term probe of pituitary GH secretion, and why that diagnostic legitimacy does not transfer to daily use.
Sermorelin fits if
Sermorelin is the more relevant molecule for someone weighing a GHRH analog with an actual clinical history through a legitimate prescriber, provided the anti-aging claims are read as unproven.
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.
