GHRP-6 is a synthetic peptide that stimulates the release of growth hormone. It binds to ghrelin receptors, leading to increased GH and IGF-1 levels, with potential benefits for muscle growth, fat loss, and recovery. Dosing typically involves multiple daily subcutaneous injections on an empty stomach to maximize its effects.
- Dosed 3 times daily due to short half-life.
- Inject on an empty stomach for maximum GH release.
- May increase appetite.
- Requires 3.0 mL of bacteriostatic water for reconstitution.
- Rotate injection sites to prevent irritation.
Reconstitution
Vial strength
5 mg
Bacteriostatic water
3 mL
Concentration
1.67 mg/mL
1 unit = 0.01 mL = 16.7 mcg
- 1Draw 3.0 mL of bacteriostatic water using a sterile syringe.
- 2Inject the water slowly down the side of the GHRP-6 vial to avoid foaming; do not shake the vial.
- 3Gently swirl or roll the vial until the peptide powder completely dissolves.
- 4Label the vial with the reconstitution date and concentration, then refrigerate at 2–8 °C (35.6–46.4 °F) and protect from light.
- 5Use the reconstituted solution within 7 days for optimal potency.
Dosing schedule
| Phase | Dose | On a U-100 syringe |
|---|---|---|
| Weeks 1–2 | 100 mcg per injection | 6 units (0.06 mL) |
| Weeks 3–4 | 200 mcg per injection | 12 units (0.12 mL) |
| Weeks 5–12 | 300 mcg per injection | 18 units (0.18 mL) |
Protocol detail
| Start | Begin with 100 mcg per injection, three times daily (300 mcg total daily) for Weeks 1–2. |
|---|---|
| Increase | Elevate to 200 mcg per injection, three times daily (600 mcg total daily) for Weeks 3–4. |
| Target | Advance to 300 mcg per injection, three times daily (900 mcg total daily) for Weeks 5–12. |
| Timing | Administer injections on an empty stomach, ensuring at least 4 hours between doses and waiting 30 minutes before eating. |
| Cycle Length | Maintain the cycle for 8–12 weeks, rotating injection sites consistently to prevent tissue irritation. |
Overview at a glance
| Goal | To stimulate pulsatile growth hormone release to support muscle development, reduce body fat, and aid in recovery. |
|---|---|
| Schedule | Three subcutaneous injections daily for 8–12 weeks, with injections spaced at least 4 hours apart. |
| Dose Range | 100–300 mcg per injection with a gradual increase, totaling 300–900 mcg daily. |
| Reconstitution | Add 3.0 mL of bacteriostatic water per 5 mg vial to achieve a concentration of approximately 1.67 mg/mL for precise unit measurements. |
| Storage | Lyophilized vials should be frozen; reconstituted solution must be refrigerated and used within 7 days. |
How it works
GHRP-6 acts as a synthetic ghrelin mimetic, engaging the growth hormone secretagogue receptor (GHS-R1a) in the pituitary gland and hypothalamus. This interaction stimulates the direct release of growth hormone from somatotroph cells and dampens somatostatin's inhibitory control over GH secretion. The result is a pulsatile pattern of GH release that mimics the body's natural rhythm. This approach helps maintain physiological feedback mechanisms, preventing excessive GH elevation. Beyond its role in GH release, GHRP-6 also demonstrates cell-protective properties by activating cell-survival pathways, shielding tissues from oxidative stress and inflammation, with potential benefits for various body systems.
Reported effects
- Enhanced muscle growth and reduced fat mass
- Improved recovery through better sleep and tissue repair
- Stimulated appetite (beneficial for weight gain goals)
- Tissue protective effects (e.g., cardioprotection, neuroprotection)
- Support for joint and connective tissue health
Reported side effects
- Transient mild increases in cortisol and ACTH
- Increased appetite and potential water retention
- Occasional injection-site reactions (redness, itching, swelling)
- Possible fleeting dizziness or flushed sensation post-injection
- Generally well-tolerated with no major safety issues reported in human trials
Storage
Lyophilised (unmixed)
Store at -20 °C (-4 °F) in dry, dark conditions, with desiccant if possible.
After reconstitution
Refrigerate at 2–8 °C (35.6–46.4 °F) and use within 7 days. Do not refreeze.
Supplies
| Peptide vials | Approximately 13 x 5 mg GHRP-6 vials for a 12-week protocol with gradual titration. |
|---|---|
| Insulin Syringes (U-100) | Around 252 syringes for a 12-week protocol (3 injections/day x 7 days/week x 12 weeks), recommend 3 x 100-count boxes. |
| Bacteriostatic Water | Approx. 4 x 10 mL bottles for a 12-week protocol (3.0 mL per vial x 13 vials = 39 mL). |
| Alcohol Swabs | About 504 swabs for a 12-week protocol (2 per injection x 3 daily x 7 days x 12 weeks), recommend 6 x 100-count boxes. |
Important notes
- Always use a new sterile insulin syringe for each injection and dispose of it in a sharps container.
- Systematically rotate injection sites (abdomen, thighs, upper arms) to prevent local irritation and lipohypertrophy.
- Inject slowly and allow a few seconds before withdrawing the needle.
- Be aware that GHRP-6 may increase appetite due to its ghrelin-mimicking effects.
- Document your daily doses, timing, and injection sites to ensure consistency throughout your cycle.
Frequently asked questions
Why is GHRP-6 injected three times daily instead of once?
GHRP-6 has a short half-life of about 2.5 hours. Multiple daily injections (three times a day) are more effective at sustaining elevated growth hormone levels throughout the day compared to a single daily dose, helping to maximize its benefits.
Should I inject GHRP-6 at a specific time relative to meals?
Yes, it is crucial to inject GHRP-6 on an empty stomach to maximize its growth hormone-releasing effects. This means waiting 2-3 hours after eating and then waiting another 30 minutes after the injection before consuming any food.
Will GHRP-6 make me hungrier?
GHRP-6 can stimulate appetite in some individuals because it mimics ghrelin, a hormone known to increase hunger. This effect can be beneficial for those aiming for weight gain but should be managed if increased appetite is undesirable.
What is the importance of rotating injection sites?
Rotating injection sites systematically (e.g., between the abdomen, thighs, and upper arms) is important to prevent localized irritation, tissue damage like lipohypertrophy, and to ensure consistent absorption of the peptide over time.
Educational reference only. These figures summarise how GHRP-6 is commonly described in research literature and supplier documentation, including the GHRP-6 listing at peptidesuk4u.co.uk. They are not a prescription, not medical advice, and not a recommendation to self-administer anything.
Related protocols
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