GHRP-2
A growth hormone–releasing peptide studied in earlier clinical research; not FDA-approved.
What it is
GHRP-2 is one of the original growth-hormone-releasing peptides, studied in the 1990s and 2000s as both a research tool and a potential diagnostic agent. It stimulates GH release and, notably, appetite — it acts on the ghrelin receptor.
It was never developed into an approved US drug. The human research that exists is early-phase and mostly diagnostic in nature; the bodybuilding uses marketed online were never the subject of controlled trials.
What researchers have actually studied it for
Growth-hormone release and GH-deficiency diagnostics in early clinical research; appetite stimulation via the ghrelin receptor.
How it works
A six-amino-acid ghrelin-receptor agonist: it mimics the stomach's hunger hormone at the pituitary (releasing GH) and at appetite circuits (stimulating hunger). Its GH release is robust but blunter than natural pulsing, with mild cortisol and prolactin spillover in early studies.
Where it came from
Born in the pre-ghrelin era — GHRPs were discovered before the receptor they activate was identified in 1996, a rare case of drug before target. GHRP-2 found a modest legitimate niche as a GH-deficiency diagnostic in Japan while its therapeutic development quietly ended.
What the research record actually contains
- Early clinical pharmacology of GH release and appetite stimulation.
- Diagnostic-use literature for GH deficiency, including regulatory acceptance in Japan.
- No controlled trials on body composition or performance in healthy adults.
What's known about risks
Acute studies reported tolerability; appetite increase, cortisol/prolactin nudges and water retention recur in the literature. Chronic wellness-pattern use has never been safety-characterized.
Where it stands legally
Not an approved US therapeutic; gray-market channel; prohibited in tested sport.
Worth asking a licensed provider
- 1.Is stimulating appetite compatible with my goals at all?
- 2.Why this vintage compound over anything with an active development program?
- 3.What testing implications exist if I compete?