GHRP-6
Peptide ·Exploratory record · not publication-reviewed ·Updated July 13, 2026
GHRP-6 is a synthetic hexapeptide growth hormone secretagogue that activates the ghrelin or growth hormone secretagogue receptor and can trigger GH release and strong appetite stimulation. It is not FDA-approved for human use, is generally sold as a research chemical, and long-term safety or body-composition outcome evidence in healthy adults is limited. Risks include hunger, glucose changes, edema, cortisol or prolactin effects, injection risks, and WADA-prohibited status for tested athletes.
Exploratory record, not a reviewed medical publication.
See the editorial and medical-review policies for the publication gate.
This safety record covers a controlled, investigational, or otherwise out-of-scope substance. It remains available for reference, but it is not part of NutriStack's public supplement publication set.
What the research says.
A quick, data-only summary. The full evidence, dosing, and sources are below.
GHRP-6 is a peptide most often used for acutely stimulates gh release in research settings, strongly stimulates appetite, may increase igf-1 indirectly with repeated gh-axis activation. NutriStack rates the overall evidence as insufficient. A typical adult dose is No FDA-approved human dose; published studies used supervised single-dose or short research protocols, commonly taken as not recommended as a supplement; research or clinical study use only. This profile indexes 3 sources.
- Acutely stimulates GH release in research settings
- Strongly stimulates appetite
- May increase IGF-1 indirectly with repeated GH-axis activation
- No approved wellness or performance use
- Marked hunger
- Water retention
- Tingling or numbness
- Active cancer or unexplained tumor risk
- Pregnancy and breastfeeding
The bottom line
Evidence rating insufficient. Most-documented uses: acutely stimulates gh release in research settings, strongly stimulates appetite, may increase igf-1 indirectly with repeated gh-axis activation. 3 sources indexed (1998–2025), with 0 interaction records on file.
How it works, mechanistically.
Core mechanism
GHRP-6 activates GHS-R1a receptors in the pituitary and hypothalamus, amplifying GH pulses through a pathway distinct from GHRH but partly dependent on endogenous GHRH tone. Ghrelin receptor activation also stimulates appetite and may affect gastric motility, glucose regulation, cortisol, and prolactin. Repeated exposure may produce desensitization and does not establish durable clinical benefit.1,2
Dosing & protocol.
Peptide requires parenteral administration in studies. Nonsterile or research-grade injection is unsafe.
What it actually costs.
Real-world pricing across three quality tiers. Assumes Research peptide vial.
Prices reflect research-market products, which are not appropriate for human use. Updated 2026-06-04.
Full safety detail.
Side effects
- Marked hunger
- Water retention
- Tingling or numbness
- Headache
- Flushing
- Injection-site reaction
- Glucose intolerance
- Possible cortisol or prolactin elevation
Contraindications
- Active cancer or unexplained tumor risk
- Pregnancy and breastfeeding
- Diabetes or uncontrolled glucose intolerance without specialist care
- History of pituitary disease without endocrinology supervision
- Competitive athletes subject to anti-doping rules1
- Non-FDA-approved human use and research-grade product injection2
Sources, by evidence tier.
Numbered references. Citations throughout the page link here.
Reference material
3- 1The 2026 Prohibited List: International StandardWorld Anti-Doping Agency · World Anti-Doping Agency · 2025
Growth hormone secretagogues and GHRPs are prohibited for athletes under S2 categories.
- 2Pharmacokinetic study of Growth Hormone-Releasing Peptide 6 (GHRP-6) in nine male healthy volunteersCabrales A et al. · European Journal of Pharmaceutical Sciences · 2013
Single intravenous bolus pharmacokinetics were studied in nine healthy men.
- 3Growth hormone (GH)-releasing peptide-6 requires endogenous hypothalamic GH-releasing hormone for maximal GH stimulationRussell-Jones DL et al. · Journal of Clinical Endocrinology and Metabolism · 1998
GHRH antagonism blunted GH response to GHRP-6, showing pathway interaction.
Common questions.
Quick answers about GHRP-6, drawn from the data on this page.
What is GHRP-6?
GHRP-6 is a synthetic hexapeptide growth hormone secretagogue that activates the ghrelin or growth hormone secretagogue receptor and can trigger GH release and strong appetite stimulation. It is not FDA-approved for human use, is generally sold as a research chemical, and long-term safety or body-composition outcome evidence in healthy adults is limited. Risks include hunger, glucose changes, edema, cortisol or prolactin effects, injection risks, and WADA-prohibited status for tested athletes.
What is GHRP-6 used for?
Commonly cited benefits of GHRP-6 include: Acutely stimulates GH release in research settings; Strongly stimulates appetite; May increase IGF-1 indirectly with repeated GH-axis activation; No approved wellness or performance use. NutriStack rates the overall evidence as insufficient.
What is a typical dose of GHRP-6?
A typical adult dose of GHRP-6 is No FDA-approved human dose; published studies used supervised single-dose or short research protocols. The commonly recommended form is Not recommended as a supplement; research or clinical study use only. These are general ranges, not personalized advice; confirm the right dose with a clinician.
What are the side effects of GHRP-6?
Reported side effects include marked hunger, water retention, tingling or numbness, headache, flushing, injection-site reaction. This is educational information; check with a healthcare professional before use.
How strong is the evidence for GHRP-6?
NutriStack rates this as Insufficient, meaning the body of evidence reviewed in NutriStack's tiering framework. Full tier criteria are at https://nutristackapp.com/methodology/evidence-tiers.
Use this with your stack
GHRP-6 in NutriStack.
Add it to your stack, see how it interacts with everything else you take, and get a Stack Score that updates the moment it does.