Half-lives / GHRP-2
GHRP-2 half-life
GHRP-2 stays in your system about 2.5 hours — five half-lives at a half-life of ≈ 30 min (0.5 h). The computed decay curve is below, with the primary source cited.
Also searched as: ghrp2, pralmorelin.
Source: GHRP-2 / pralmorelin PK (Asakura 2010, PMID 20662346); GH peak ~60 min then cleared
Frequently asked
How long does GHRP-2 stay in your system?
With a half-life of ≈ 30 min, roughly 97% of a single GHRP-2 dose is cleared after five half-lives — about 2.5 hours. Repeated dosing accumulates and takes correspondingly longer to clear.
What does a ≈ 30 min half-life mean in practice?
Every 30 min, the remaining amount halves: 100% → 50% → 25% → 12.5%, and so on. The curve above plots exactly this decay for a single dose.
Where does this GHRP-2 half-life number come from?
GHRP-2 / pralmorelin PK (Asakura 2010, PMID 20662346); GH peak ~60 min then cleared. We cite a primary source for every half-life we publish and version every change.
Related: GHRP-2 reconstitution calculator · GHRP-2 dose charts
Related half-lives
Other Growth-hormone & IGF axis — how long each stays active:
Guides mentioning GHRP-2
See your own estimated levels
The Zyra Track app plots this curve from the doses you actually log — accumulation, overlaps, and all. Free during the founding period.
Zyra Track is a research and educational utility. Nothing on this page is medical advice, a dosing recommendation, or an endorsement of any compound. We never sell or source compounds and refuse sourcing questions. Consult a qualified clinician for decisions about your health.