GHRP-2 and GHRP-6 vs Hexarelin

Name: GHRP-2 and GHRP-6 vs Hexarelin
Published: 2026-10-24

Updated Oct 24, 202610 sources

Key differences

1Hexarelin was built from GHRP-6.
2At 1 and 2 mcg/kg IV, hexarelin and GHRP-2 gave similar GH responses and similar rises in prolactin, ACTH and cortisol.
3Guides say hexarelin brings less hunger than GHRP-6 and loses effect faster with daily use than any other GHRP.

Facts from each record, in the same words as their own pages.

GHRP-2 and GHRP-6 and Hexarelin side by side
	GHRP-2 and GHRP-6	Hexarelin
Category	GH axis	GH axis
Evidence	Limited human data	Limited human data
FDA status	FDA 503A Category 2Regulatory	Not FDA approvedRegulatory
WADA	Prohibited	Prohibited
Half-life	GHRP-2: about 0.55 hours, with GH peaking around 60 minutes. GHRP-6: about 2.5 hours.Competitor guide	About 55 minutes, per a 2026 review. The 1994 study it cites gave 55 minutes for the fall in blood GH after a dose, so the figure describes the GH response more than the peptide itself.Clinical study About 70 minutes in plasma, per guides.Competitor guide
Routes	Subcutaneous injection, Other route	Subcutaneous injection, Intravenous (IV), Nasal
Forms	Not reported	Vial (powder)
Reported doses	100 to 400 mcg (subcutaneous injection) 100 mcg (other route)	50 to 300 mcg (subcutaneous injection) 1.5 mcg/kg (subcutaneous injection) 0.5 to 2 mcg/kg (intravenous (iv))
Most cited frequency	2 to 3 times daily, fasted	1 to 2 times a day
Vial sizes	2 mg, 5 mg, 10 mgCompetitor guide	2 mg, 5 mgCompetitor guide
Mixed vial keeps	Fridge, 2 to 8 °C, protected from light.Competitor guide	Fridge, 2 to 8 °C; never freeze.Competitor guide
Protocols on file	13	16

Doses shown are what sources report, labelled by origin. Not medical advice.

10 sources, each checked by date. Record updated Oct 24, 2026. Numbers are restated in our own words and labelled by where they came from.