GHRP-2 and GHRP-6 vs Ipamorelin

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

Updated Oct 24, 20269 sources

Key differences

1In swine, ipamorelin matched GHRP-6 on GH release. GHRP-2 was more potent per mcg but reached a lower maximum than GHRP-6.
2GHRP-2 and GHRP-6 raised ACTH and cortisol; ipamorelin did not.
3Hunger: moderate with GHRP-2, strong with GHRP-6, mild with ipamorelin per guides.
4Half-life: about 0.55 hours for GHRP-2, about 2.5 hours for GHRP-6, about 2 hours for ipamorelin.
5In animals, ipamorelin matched GHRP-6 on GH release. GHRP-2 and GHRP-6 raised ACTH and cortisol; ipamorelin did not.
6Hunger is mild with ipamorelin per guides, and strong with GHRP-6.

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

GHRP-2 and GHRP-6 and Ipamorelin side by side
	GHRP-2 and GHRP-6	Ipamorelin
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 2 hours after IV infusion in healthy men. Subcutaneous half-life has not been published.Clinical study
Routes	Subcutaneous injection, Other route	Subcutaneous injection
Reported doses	100 to 400 mcg (subcutaneous injection) 100 mcg (other route)	100 to 400 mcg (subcutaneous injection)
Most cited frequency	2 to 3 times daily, fasted	Once daily, before bed
Vial sizes	2 mg, 5 mg, 10 mgCompetitor guide	2 mg, 5 mg, 10 mgCompetitor guide
Mixed vial keeps	Fridge, 2 to 8 °C, protected from light.Competitor guide	Fridge, 2 to 8 °C.Competitor guide
Protocols on file	13	10

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

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