GHRP-6

Quickstart highlights

Dosing & reconstitution guide

Standard protocol (2 mL = 2,5 mg/mL)

A 5 mg vial dissolved in 2 mL bacteriostatic water gives a concentration of 2,5 mg/mL. Calculate your own dilution →

Reconstitution steps

1. Let the vial reach room temperature and wash your hands.
2. Disinfect both rubber stoppers with an alcohol swab.
3. Draw up 2 mL of bacteriostatic water.
4. Inject the water slowly down the glass wall, not directly onto the powder.
5. Swirl gently until clear — never shake.
6. Label the vial with date and concentration and refrigerate.

Supplies needed

• GHRP-6 vial (5 mg)
• Bacteriostatic water
• Mixing syringe (1–3 mL) and U-100 insulin syringes
• Alcohol swabs and sharps container

Protocol overview

Dosing protocol in research

Values as described in literature and research protocols; not dosing advice.

Storage instructions

• Lyophilised (powder): cool, dry and dark; long-term at −20 °C.
• After reconstitution: refrigerator at 2–8 °C, use within ~4 weeks.
• Avoid repeated freezing and thawing.

Important notes

How this works

GHRP-6 (Growth Hormone Releasing Peptide-6) is a hexapeptide belonging to the first generation of synthetic growth hormone secretagogues. Developed in the 1980s, it serves as a tool for studying natural hormone release. Researchers primarily use it to investigate appetite regulation and endocrine signaling pathways.

This peptide acts as a mimetic for the endogenous hormone ghrelin. It binds to the growth hormone secretagogue receptor (GHS-R1a) located in the pituitary and hypothalamus. This binding triggers a signaling cascade that stimulates the release of endogenous growth hormone. Unlike GHRP-2, GHRP-6 has a significantly stronger effect on brain regions responsible for hunger signaling. The plasma half-life is brief, typically lasting between 20 and 60 minutes. Beyond GH stimulation, the peptide influences extra-endocrine processes such as gastric emptying.

GHRP-6 research spans animal models and early-stage human clinical trials. Scientists have explored its use for growth disorders, muscle wasting, and cardiac tissue repair following infarction. Studies have also investigated protective effects on the gastric mucosa. GHRP-6 is not approved for medical use by authorities like the FDA or EMA. It is listed as a prohibited S2 substance by WADA. Many questions regarding its efficacy in specific pathologies remain open due to a lack of large-scale Phase III trials.

Potential benefits & side effects

Effects described in research

• GH release
• Appetite stimulation
• Supports weight gain

Common side effects

• Temporary water retention
• Tingling or numbness in the hands
• Injection-site redness
• Headache
• Intense hunger

The most frequently reported side effect in literature is an intense, often uncontrollable hunger drive shortly after administration. Study participants also reported water retention and transient elevations in cortisol and prolactin levels. Due to a lack of long-term human data, the risks associated with chronic use are not fully established.

Contraindications

• Pregnancy or breastfeeding
• Active or prior cancer
• Under 18 years of age
• Uncontrolled diabetes

Lifestyle factors

• Administration on an empty stomach (2 h after / 30 min before food) is most often described.
• Carbohydrates and fat around administration blunt the GH pulse.
• Adequate sleep supports natural nocturnal GH release.

Injection technique

• Choose a site with subcutaneous fat: abdomen (5 cm from the navel), thigh or back of upper arm.
• Disinfect, pinch a skin fold and insert at a 45–90° angle.
• Inject slowly, wait 5 seconds and withdraw.
• Rotate sites and use each needle once.

Recommended source

Quality varies widely between suppliers. Look for an independent HPLC/MS lab report per batch, purity ≥ 98% and clear storage and shipping conditions.

As a reference we use the GHRP-6 from PeptideWinkel, which publishes lab reports per batch.

Frequently asked questions