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GH secretagogue / ghrelin mimetic (the original GHRP)

GHRP-6

Research use only

Written by pep4U Editorial Team · Last reviewed October 12, 2026

A synthetic hexapeptide that stimulates GH release via the ghrelin receptor and strongly stimulates appetite.

Class / typeGH secretagogue / ghrelin mimetic (the original GHRP)
CategoryGrowth Hormone & Muscle
Status (Jul 2026)Research use only

How it works

Non-selective GHS-R1a agonist; besides GH release it activates hypothalamic NPY/AgRP feeding neurons (intense hunger) and raises cortisol/prolactin.

Known / used for

No approved use; off-label/research for GH stimulation and appetite stimulation.

Positives

Robust GH release; pronounced appetite boost can help hard-gainers/bulking; short-acting.

Negatives & risks

Intense hunger; greater cortisol/prolactin rise (gynecomastia risk in sensitive users); water retention, bloating, fatigue, injection-site reactions; no long-term data; purity concerns.

Frequently asked questions

What is GHRP-6?
A synthetic hexapeptide that stimulates GH release via the ghrelin receptor and strongly stimulates appetite. Non-selective GHS-R1a agonist; besides GH release it activates hypothalamic NPY/AgRP feeding neurons (intense hunger) and raises cortisol/prolactin.
What is GHRP-6 used or researched for?
No approved use; off-label/research for GH stimulation and appetite stimulation.
Is GHRP-6 FDA-approved or legal?
NOT FDA-approved; research-use-only; not compounding-approved. WADA-banned.
What are the main risks or downsides of GHRP-6?
Intense hunger; greater cortisol/prolactin rise (gynecomastia risk in sensitive users); water retention, bloating, fatigue, injection-site reactions; no long-term data; purity concerns.

Legal / regulatory status

NOT FDA-approved; research-use-only; not compounding-approved. WADA-banned.

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