GHRP-6 (5mg)
GHRP-6 dosing protocols utilize this potent hexapeptide growth hormone secretagogue to stimulate natural GH release via the ghrelin receptor pathway. By enhancing pulsatile GH secretion and increasing IGF-1, it supports muscle growth, recovery, fat metabolism, and appetite stimulation. Unlike exogenous GH, it preserves natural feedback loops. This protocol outlines a three times daily subcutaneous approach.
Reviewed by the AllPeptides.eu Editorial Team·Last reviewed: 2026-06-16
Educational information. Not medical advice, and no efficacy claim is implied. Regulatory approval is not a use recommendation by AllPeptides.eu.
⚠️ For informational/educational purposes only. Not medical advice. We do not sell any products. Self-treatment carries serious risks — consult a healthcare professional. Disclaimer
Research monograph
See the full GHRP-6 encyclopedia page with mechanism, evidence tier, related variants and research context.
How It Works
GHRP-6 binds to the ghrelin receptor (GHS-R1a) in pituitary somatotroph cells, triggering a potent pulsatile release of GH through G-protein and phospholipase C activation. Unlike exogenous GH, it maintains the physiological hypothalamic-pituitary feedback without somatostatin suppression. Studies show it can restore GH response even in obese individuals with blunted secretion, producing GH peaks approximately double that of GHRH alone. The half-life is ~20 minutes, necessitating multiple daily administrations.
Quick Start
- Reconstitution: Add 2.5 mL bacteriostatic water → 2.0 mg/mL concentration.
- Typical dose range: 100–300 mcg per injection, three times daily.
- Storage: Lyophilized: freezer −20 °C; post-reconstitution, refrigerator 2–8 °C; avoid freeze-thaw.
Standard Protocol (2.5 mL = 2.0 mg/mL)
Route: Subcutaneous | Frequency: Three times daily
| Week | Dose | Units (per injection) |
|---|---|---|
| Wk. 1–8 (Standard) | 100 mcg/injection | 5 Units (0.05 mL) |
| Wk. 1–8 (Moderate) | 150 mcg/injection | 7.5 Units (0.07 mL) |
| Wk. 1–8 (Advanced) | 200–300 mcg/injection | 10–15 Units (0.10–0.15 mL) |
Studies report administration three times daily subcutaneously (Morning, Afternoon, Before bed) to mimic natural pulsatile GH release. At least 3–4 hours apart. On an empty stomach (30+ minutes before eating).
Related compounds
Reconstitution Steps
- Draw up 2.5 mL of bacteriostatic water.
- Slowly inject against the vial wall; avoid foaming.
- Gently swirl/rotate until dissolved (do not shake).
- Label and refrigerate at 2–8 °C.
Protocol Overview
- Objective: Stimulate natural pulsatile GH release to increase IGF-1, muscle growth, and recovery.
- Schedule: 3 subcutaneous injections daily for 8–12 weeks.
- Storage: Lyophilized frozen; reconstituted refrigerated for up to 28 days.
Dosing Protocol
- Standard: 100 mcg TID (300 mcg/day) — documented for a significant GH/IGF-1 increase.
- Moderate: 150 mcg TID (450 mcg/day) for an enhanced response.
- Advanced: 200–300 mcg TID (600–900 mcg/day) — upper practical limit.
- Timing: Morning, Afternoon, Before bed; 3–4 hours apart; ideally on an empty stomach.
- Cycle Duration: 8–12 weeks; consider a 1–2 week break after 3 months.
- Break between cycles: After the cycle, a break of 4–6 weeks is recommended. The break restores hormonal balance and GHSR sensitivity.
Washout & Cycle Restart
When can I restart?
After the cycle, a break of 4–6 weeks is recommended. The break restores hormonal balance and GHSR sensitivity.
Minimum wait period: 4 weeks
Storage Instructions
- Lyophilized: Store at −20 °C for long-term; 2–8 °C is acceptable for weeks.
- Reconstituted: Refrigerate at 2–8 °C; use within 28 days with bacteriostatic water.
- Allow vials to reach room temperature before opening.
Important Notes
- GHRP-6 typically causes intense appetite within 20–30 minutes post-injection.
Potential Benefits & Side Effects
Potential Benefits:
- Increased GH/IGF-1: Sustained increases supporting anabolic processes and body composition.
- Muscle and recovery: Enhances lean muscle mass, strength, and tissue repair via IGF-1.
- Appetite stimulation: Potent hunger effect via ghrelin mimicry; useful for cachexia.
- Sleep regulation: Studies indicate increased duration of stage 2 sleep without significant REM disruption.
- Generally well-tolerated; no serious adverse events at moderate doses.
Potential Side Effects:
- Transient increase in ACTH and cortisol (typically clinically insignificant).
- Occasional mild injection site reactions.
⚠️ Serious Warnings & Long-Term Risks
The following warnings are based on published literature, FDA labels, and post-marketing surveillance. They do not constitute medical advice. Consult a healthcare professional.
Increased cortisol, prolactin & ghrelin
GHRP-6 significantly increases ghrelin (intense hunger), cortisol, and prolactin. May affect glycemic control and reproductive function.
📄 Eur J Endocrinol 1998References
- PMC — Safety and Efficacy of GH Secretagogues — Mechanism, dosing, GH/IGF-1 effects, and safety profile of GHRP-6
View Source - PubMed — Pharmacokinetics of GHRP-6 — Pharmacokinetics, dose-response, and high-dose tolerance
View Source - PubMed — Massive GH release after combined GHRH and GHRP-6 — Synergistic GH release in obesity
View Source - PubMed — GHRP-6 stimulates sleep, GH, ACTH and cortisol — Human study on sleep architecture
View Source - PubMed — GHRP-6 mimics ghrelin's stimulation of food intake — Orexigenic action
View Source
Recommended Supplements
L-Arginine + L-Ornithine
ZMA (Zinc + Magnesium + B6)
External Sources & Regulatory Status
Regulatory Approvals
Research-only — No regulatory approval
Educational information. Not medical advice, and no efficacy claim is implied. Regulatory approval is not a use recommendation by AllPeptides.eu.
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