GHRP-2: reference dosing schedule
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Calculate the GHRP-2 dose
The calculator is already set up for GHRP-2 — adjust the dose or diluent volume for your vial.
Human dosing
GHRP-2 dosing in research protocols is set around a specific target (a growth-hormone pulse or another endpoint), so the GHRP-2 dosing schedule below is a reference point drawn from described regimens, not a standard for self-administration.
| Period / condition | Dose | Escalation |
|---|---|---|
| Start | 100 mcg, once daily | Starting dose |
| Standard regimen | 100–200 mcg, 1–3x/day | Increase if needed |
| Maximum in this schedule | up to 300 mcg (≈3–4 mcg/kg at 70–100 kg body weight) per injection, 2–3x/day | Maximum in this schedule |
Practical dosing and effect details
GHRP-2 belongs to the growth-hormone-releasing-peptide family and acts through the ghrelin receptor (GHS-R1a), triggering a short growth-hormone pulse within 15-30 minutes of administration. The effect is a pulse, not a sustained rise: the peptide's own blood concentration falls off much faster than the growth-hormone elevation it triggers, so one large daily dose reproduces the natural secretion rhythm poorly. The schedule on this page (100 mcg as the starting dose, up to 300 mcg per injection at the upper limit, 1-3 administrations a day) reflects exactly that logic: several smaller doses through the day rather than one large one. Dose increases in the described protocols are usually tied to an observed response rather than applied blindly: sources describe this as titrating to the smallest dose that produces the expected effect, so a real protocol can stop at a lower step of the schedule. This is reference information for planning a research protocol, not a medical recommendation and not instructions for self-administration.
How to reconstitute
An example reconstitution for convenient dosing. The exact ratios depend on your vial. For research reference only — not medical guidance.
- 1Add the diluentUse bacteriostatic water. Example: 2 ml into a 5 mg vial.GHRP-25 mg+ 2 mlDiluent
- 2Get the concentrationExample: 5 mg in 2 ml =GHRP-22.5 mg/ml(2,500 mcg/ml)
- 3Work out the volume per doseFor example, for a 0.1 mg dose:0.1 mg = 0.04 ml= 4 u. (U-100)
This is only an example calculation. You can use a different diluent volume — plug your own numbers into the calculator. Open calculator →
Research protocols
GHRP-2: reference regimens
GHRP-2 is given by subcutaneous injection.
More scientific background in the GHRP-2 monograph
Notes and safety
- • GHRP-2 is a research peptide. Human safety and efficacy data are limited.
- • The regimens shown are based on publications and research protocols, not clinical recommendations.
- • Individual reactions may vary. Published protocols typically start dosing at the lower end of the reported range.
- • Not recommended for use with chronic illness, pregnancy, or breastfeeding.
- • This information is for educational purposes and is not medical advice.
