WhatPeptide

GHRP-6

An early GH secretagogue peptide commonly associated with increased appetite alongside GH pulse stimulation.

Moderate evidence Unregulated Growth Hormone Releasing Peptide

Written by WhatPeptide Editorial Team · Last updated 2026-03-17

Half-life

Around 20-30 minutes

Dosage range

100-300 mcg one to three times daily (published research context)

Administration

Subcutaneous injection

Research level

Moderate

How GHRP-6 works

GHRP-6 activates GHSR-1a in pituitary and hypothalamic pathways, increasing GH secretion and orexigenic signaling. It has broader neuroendocrine effects than highly selective secretagogues and can elevate appetite substantially. Literature is stronger for endocrine biomarkers than for long-term clinical outcomes.

Also known as: Growth Hormone Releasing Peptide-6

Research relevance

GH Boost
Moderate relevance 75
Muscle Growth
Moderate relevance 70
Recovery & Healing
Moderate relevance 50
Anti-Aging & Longevity
Moderate relevance 50
Sleep & Relaxation
Some relevance 45
Fat Loss
Some relevance 40
Hair & Skin
Some relevance 20
Sexual Health
Some relevance 20
Injury Rehab
Some relevance 20

Side effects & safety

Marked appetite increase Water retention Tingling Headache Elevated IGF-1 — theoretical concern for cancer promotion with prolonged use Possible insulin resistance with chronic use

Contraindications

Pregnancy
Active cancer risk discussion required
Severe obesity with hyperphagia

Consult a healthcare provider before use if any of these apply to you.

Key studies

FAQ

What is GHRP-6? +
An early GH secretagogue peptide commonly associated with increased appetite alongside GH pulse stimulation. Its mechanism of action is supported by moderate clinical and preclinical evidence.
What is GHRP-6 researched for? +
GHRP-6 has the strongest research relevance for GH Boost, Muscle Growth, Recovery & Healing. Evidence is supported by moderate clinical and preclinical evidence.
What are the side effects of GHRP-6? +
Reported side effects include Marked appetite increase, Water retention, Tingling, Headache, Elevated IGF-1 — theoretical concern for cancer promotion with prolonged use, Possible insulin resistance with chronic use. Key contraindications: Pregnancy; Active cancer risk discussion required; Severe obesity with hyperphagia.
Is GHRP-6 FDA approved? +
GHRP-6 is not FDA-approved. It is available as a research compound or through compounding pharmacies in some jurisdictions.
How is GHRP-6 administered? +
GHRP-6 is typically administered via subcutaneous route. Researched dosage range: 100-300 mcg one to three times daily (published research context). Half-life: Around 20-30 minutes.

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