Quick facts
- Class
- GHRP / ghrelin mimetic (synthetic peptide)
- Studied for
- Growth-hormone release
- Era
- One of the first-generation GHRPs (early 1990s)
- Approval
- Not FDA-approved; banned by WADA
- Receptor
- Ghrelin / GH-secretagogue receptor (GHS-R)
- Family
- GHRP class (with GHRP-2, GHRP-6, hexarelin, ipamorelin)
Key takeaways
- GHRP-1 is one of the original growth-hormone-releasing peptides, dating to the early 1990s.
- It acts on the ghrelin receptor to trigger the body's own GH release.
- It has been overtaken by more selective or potent successors (ipamorelin, GHRP-2/6, hexarelin).
- Modern human outcome data are lacking.
- Not FDA-approved; banned in sport by WADA.
Overview
GHRP-1 is one of the earliest synthetic growth-hormone-releasing peptides, part of the same family as GHRP-2, GHRP-6, hexarelin, and ipamorelin. Like the others, it prompts the pituitary to release the body's own growth hormone.[2]
It is largely of historical and research interest today, having been overtaken by more selective or potent successors.
How it works
GHRP-1 acts on the ghrelin / growth-hormone-secretagogue receptor (GHS-R), triggering a pulse of endogenous growth hormone rather than supplying GH directly.[3] This is the same broad mechanism shared across the GHRP class.
Research & benefits
Early studies established its growth-hormone-releasing activity, including in children and adolescents[2] and in isolated pituitary cells.[3] Modern human outcome data for muscle growth or performance are lacking. GHRP-1 also appears in anti-doping research, where its urinary metabolites have been characterized for detection.[1]
Safety & legal status
Human safety data are limited and dated. GHRP-1 is sold as a research chemical, is not FDA-approved, and — like all growth-hormone secretagogues — is banned at all times under the World Anti-Doping Agency code.
Frequently asked questions
What is GHRP-1 used for?
GHRP-1 was studied for stimulating the body's own growth-hormone release. It has little modern human outcome data and has been overtaken by newer GHRPs. It is a research chemical, not an approved medicine.
How is GHRP-1 different from GHRP-2 and GHRP-6?
All are growth-hormone-releasing peptides acting on the ghrelin receptor. GHRP-1 is an earlier member of the family, while GHRP-2 and GHRP-6 are more commonly discussed today — GHRP-6 notably for strong appetite stimulation.
Is GHRP-1 legal in sport?
No. Like all growth-hormone secretagogues, GHRP-1 is banned at all times under the World Anti-Doping Agency code, and it is not FDA-approved.
References
Each source links to its original record — peer-reviewed studies, regulator pages, or reference texts, labelled by type. We summarize findings neutrally; a citation is a reference, not an endorsement, and not a claim that its authors reviewed this page.
- Semenistaya E, Zvereva I, Thomas A, et al. Determination of growth hormone releasing peptides metabolites in human urine after nasal administration of GHRP-1, GHRP-2, GHRP-6, Hexarelin, and Ipamorelin. Drug Test Anal. 2015. Peer-reviewed study
- Laron Z, Bowers CY, Hirsch D, et al. Growth hormone-releasing activity of growth hormone-releasing peptide-1 (a synthetic heptapeptide) in children and adolescents. Acta Endocrinol (Copenh). 1993. Peer-reviewed study
- Wu D, Chen C, Zhang J, et al. Effects in vitro of new growth hormone releasing peptide (GHRP-1) on growth hormone secretion from ovine pituitary cells in primary culture. J Neuroendocrinol. 1994. Peer-reviewed study