What is the half-life of GHRP-2 / GHRP-6?
GHRP-2 / GHRP-6 has a reported half life of ~15-30 minutes, given subcutaneous. That is why it is typically dosed 1-3x daily. A shorter half life means more frequent dosing to keep blood levels steady, a longer one lets you space doses further apart.
Quick facts
- Half-life: ~15-30 minutes
- Route: Subcutaneous
- Typical schedule: 1-3x daily
- Cycle length: 8-12 weeks on, 4 weeks off
References
- Effects of GH-releasing peptide-2 (GHRP-2) on body composition — Bowers CY et al., JCEM, 2004
- Estradiol regulates GH-releasing peptide's interactions with GH-releasing hormone and somatostatin in postmenopausal women — Norman C et al., European Journal of Endocrinology, 2014
- Growth hormone-independent cardiotropic activities of growth hormone-releasing peptides in normal subjects, in patients with growth hormone deficiency, and in patients with idiopathic or ischemic dilated cardiomyopathy — Broglio F et al., Endocrine, 2001
Pepdex is an editorial reference, not medical advice. Peptides vary in legal and approval status by country, many are research compounds without full human safety data. Talk to a qualified clinician before starting anything.
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Last updated 2026-06-06.