# GHRP-6 — dosage, half-life & reference guide | PepVault

Source: https://pepvault.app/peptides/ghrp-6

Last updated: 2026-09-26

[Library](https://pepvault.app/peptides) [Growth hormone](https://pepvault.app/peptides#growth-hormone) reviewed September 2026

# GHRP-6 Dosage, half-life & reference guide

Also known as Growth Hormone Releasing Peptide-6

One of the first growth hormone releasing peptides, with one standout effect: strong appetite stimulation.

- **Studied range:** 100–300 mcg
- **How often:** 2–3× daily
- **Half-life:** ~20 min
- **Evidence:** Moderate
- **Route:** SubQ injection

Studied in research — not a recommendation.

[GHRP-6 dose guide](https://pepvault.app/lab/dosage/ghrp-6)

## How it works.

First-generation GH secretagogue that stimulates GH via ghrelin receptor activation. Significantly increases appetite (shown in animals and widely reported by users) — useful for those seeking to bulk. Also raises cortisol and prolactin moderately.

**Commonly reported:** Intense hunger soon after a dose, water retention and puffiness, and a head rush or flush after injecting. Useful for people who want to eat more, but the hunger can be overwhelming for those trying to stay lean. Also raises cortisol and prolactin.

## Where GHRP-6 works.

- ### Brain, nerves & sleep

  **Reported by users.** GH is rising too, and sleep often deepens.
- ### Appetite & metabolism

  **In animals.** Significantly increases appetite (shown in animals and widely reported by users) — useful for those seeking to bulk.
- ### Muscle

  **Reported by users.** If you can channel the appetite into quality nutrition, GHRP-6 is a useful tool for hard-gainers.

An area lights for what a peptide is used for and what people report, with the evidence beside it. It isn’t a promise that it works there.

## Week by week.

What to expect in the first 8 weeks

1. Day 1–7 Community

   ### The hunger is real — plan for it

   GHRP-6's signature effect hits fast. Commonly reported: intense hunger within about 15–20 minutes of a dose. If you're trying to bulk, this is a feature; if you're trying to stay lean, plan your meals around it. GH is rising too, and sleep often deepens.

   The science

   GHRP-6 is a first-generation ghrelin receptor agonist. In rats its appetite effect runs through hypothalamic NPY neurons (Dickson & Luckman 1997). The hunger signal is pharmacological, not psychological — it activates the same receptors as the "hunger hormone" ghrelin.

   Sources

   - Dickson & Luckman (1997)
   - Bowers et al. (1984)

   Updated Sep 2026
2. Day 7–56 Community

   ### GH is elevated — use the appetite wisely

   If you can channel the appetite into quality nutrition, GHRP-6 is a useful tool for hard-gainers. Commonly reported: strong hunger plus water retention or puffiness. GH output is strong, IGF-1 is climbing, and the extra calories feed growth and repair.

   The science

   GHRP-6 produces robust GH release, with prolactin and cortisol roughly doubling after a dose (Bowers 1990). Users commonly hold that it desensitizes faster than GHRP-2 and rotate between the two, though no study compares them. Whether the appetite effect lasts hasn't been studied for GHRP-6; with related agonists it faded over weeks to months (Mericq 2003; Nass 2008).

   Sources

   - Bowers et al. (1990)

   Updated Sep 2026
3. Any day Clinical

   ### What GHRP-6 is built on

   GHRP-6 (1984) was the first growth hormone releasing peptide with strong activity in living animals, and it opened the secretagogue field. Human data are small, single-dose studies, and cleaner options like Ipamorelin have largely replaced it. Still has a niche for hardgainers who want the appetite boost as a primary feature.

   The science

   GHRP-6 was one of the first synthetic GH secretagogues developed. It helped identify the ghrelin receptor (GHS-R1a) and establish the GHRH+GHRP synergy paradigm (Bowers 1990). Less selective than newer peptides — raises cortisol, prolactin, and appetite in addition to GH. Never approved; FDA lists it in compounding category 2, citing its effects on cortisol and blood glucose.

   Sources

   - Bowers et al. (1984)
   - Bowers et al. (1990)

   Updated Sep 2026

Day 1 is the day you start it.

## Mixing and a typical run.

Example numbers

### Reconstitution example

Reconstitute a 5 mg vial of GHRP-6 with 2 mL of bacteriostatic water and a 200 mcg dose is 8 units on a U-100 syringe, about 25 doses per vial.

- **Vial:** 5 mg
- **Water:** 2 mL
- **Amount:** 200 mcg

Draw to **8 units**

0.3 mL insulin syringe · 30 units

[Mix it in the Reconstitution Lab](https://pepvault.app/lab) [Open the calculator](https://pepvault.app/tools/reconstitution-calculator)

### Run notes

- **Cycle:** 8–12 weeks. Strong appetite effect means some cycle more conservatively. Community practice — opinions vary. Not a clinical recommendation.
- **Timing:** Fasted injection essential — food blunts GH pulse significantly.
- **Route:** SubQ injection
- **Stacks:** CJC-1295 no DAC, Sermorelin

## Safety.

### Common side effects

- Strong appetite increase
- Water retention
- Fatigue
- Cortisol elevation
- Prolactin elevation

## Goes with.

- [CJC-1295 no DAC](https://pepvault.app/peptides/cjc-1295-no-dac)
- [Sermorelin](https://pepvault.app/peptides/sermorelin)

## Questions people ask.

### What is GHRP-6?

One of the first growth hormone releasing peptides, with one standout effect: strong appetite stimulation.

### How is GHRP-6 dosed in research?

The research range for GHRP-6 is 100–300 mcg, 2–3x daily. Studied in research — not a recommendation.

### How long does GHRP-6 last?

The half-life of GHRP-6 is ~20 min.

### What do people report on GHRP-6?

Commonly reported on GHRP-6: intense hunger soon after a dose, water retention and puffiness, and a head rush or flush after injecting. Useful for people who want to eat more, but the hunger can be overwhelming for those trying to stay lean. Also raises cortisol and prolactin.

### Is GHRP-6 safe?

The research basis for GHRP-6 is moderate: animal studies + some human data. Common side effects in the library: strong appetite increase, water retention, fatigue, cortisol elevation and prolactin elevation.

### What does GHRP-6 stack with?

Common stacks for GHRP-6: CJC-1295 no DAC and Sermorelin.

## Research.

The literature

### Search the latest research

[PubMed](https://pubmed.ncbi.nlm.nih.gov/?term=GHRP-6) [Google Scholar](https://scholar.google.com/scholar?q=GHRP-6)

## Reference.

- **Cadence:** 2–3× daily 2–3x daily
- **Half-life:** ~20 min
- **Research basis:** Moderate Animal studies + some human data

## More growth hormone peptides

- [Hexarelin 100–200 mcg](https://pepvault.app/peptides/hexarelin)
- [MK-677 10–25 mg](https://pepvault.app/peptides/mk-677)
- [Fragment 176-191 250–500 mcg](https://pepvault.app/peptides/fragment-176-191)
- [IGF-1 LR3 20–50 mcg](https://pepvault.app/peptides/igf-1-lr3)
- [PEG-MGF 200–400 mcg](https://pepvault.app/peptides/peg-mgf)
- [Follistatin-344 100–200 mcg](https://pepvault.app/peptides/follistatin-344)

## Free tools

- [GHRP-6 dose guide](https://pepvault.app/lab/dosage/ghrp-6)
- [Reconstitution Lab (3D)](https://pepvault.app/lab)
- [Injection guide (3D)](https://pepvault.app/lab/injection)
- [Peptide Sky (3D)](https://pepvault.app/lab/sky)
- [Peptide tier list](https://pepvault.app/lab/tiers)
- [Reconstitution calculator](https://pepvault.app/tools/reconstitution-calculator)
- [Half-life & active level](https://pepvault.app/tools/peptide-half-life-calculator)

PepVault for iPhone

## Track GHRP-6 in PepVault

Log every dose and keep your vial and the doses left in it. 7 days free on the yearly plan for new subscribers.

[Download on the App Store](https://apps.apple.com/app/apple-store/id6779318649?pt=129020030&ct=peptides-cta&mt=8)

[Open the calculator](https://pepvault.app/tools/reconstitution-calculator) [How the vial count works](https://pepvault.app/peptide-vial-tracker-app) [Explore the live demo](https://pepvault.app/login)

Reviewed September 2026 [How we check the library](https://pepvault.app/about#library)

PepVault is a research and tracking resource, not medical advice. Ranges are what studies used, never a dose for you. Brand names are trademarks of their owners; PepVault is independent of them.

PepVault is a private research and tracking tool, not medical advice. The information here is reference material from published literature and community use — always verify it and discuss any protocol with a qualified clinician before changing it.

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