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GHRP-2
Research Use
Also known as Pralmorelin, KP102
Function
Primary
GH deficiency testing · Body composition
Secondary
Anti-aging
Mechanism
Ghrelin / GHS-R1a agonist — potent GH release; used in diagnostic GH stimulation tests; raises IGF-1; appetite stimulation.
Evidence
Pre-clinical / Observational
Research
Phase I/II; approved diagnostically in Japan
Dosing
Range
100–300 mcg/dose
Frequency
1–3× daily
Route
Subcutaneous
Administration & Technique
Subcutaneous (SubQ)
Default route for most research and therapeutic peptides — best absorption for reconstituted powder.
Device31G × 5/16" insulin syringe (U-100). 100 units = 1 mL.
TechniquePinch skin at abdomen (2" from navel), outer thigh, or love handle. Insert at 45–90°. Rotate sites daily to prevent lipohypertrophy. Alcohol-swab site, air-dry, inject slow, hold 5 sec.
Injection & Application Sites
Front
Back
Subcutaneous (SubQ)
- Abdomen — 2 in (5 cm) away from the navel, either side. Fastest, most consistent SubQ absorption.
- Flank / love handle — Lateral fat pad above the hip. Good rotation site when the abdomen is tender.
- Outer thigh — Upper outer quadrant, a hand-width below the hip. SubQ pinch at 45°.
Diagram is a general illustration, not a medical instruction. Rotate sites every injection, keep 1 in (2.5 cm) between recent sites, and avoid scars, moles, bruises and the navel area.
Cycling
8–12 weeks on / 4 weeks off.
Timing & Interactions
When to take
2–3× daily fasted (pre-workout, mid-day, pre-bed). Wait 20–30 min before eating. Expect appetite spike ~15 min post-dose.
Do not combine with
- ·Ipamorelin, GHRP-6, Hexarelin — same class
- ·MK-677 — chronic ghrelin overlap
Complements
- ·Mod GRF 1-29 or CJC-1295 — GHRH pairing
Notes
Raises prolactin & cortisol slightly at higher doses.
Storage & Reconstitution
Powder (Pre-Reconstitution)
Lyophilized powder: refrigerate 2–8°C for up to 24 months, or freeze at –20°C for extended storage. Keep sealed, desiccated, and protected from light.
After Reconstitution
After reconstitution with bacteriostatic water, refrigerate at 2–8°C and use within 28 days. Discard if cloudy, discolored, or precipitated.
Notes
Do not freeze after reconstitution — freeze/thaw cycles degrade most peptides.
Reconstitution Calculator
Concentration
2.50 mg/mL
Volume per dose
0.100 mL
Insulin syringe
10.0 units (U-100)
1 mL = 100 units on a standard U-100 insulin syringe. Draw to the nearest 0.5 unit and confirm dosing with a clinician before injection.
Your Notes
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Benefits
- ·Strong GH pulse
- ·Useful diagnostic tool
- ·Body composition support (off-label)
Risks
- ·Cortisol and prolactin elevation
- ·Strong appetite stimulation
- ·Desensitization
Contraindications
- ·Active malignancy
- ·Pregnancy
Regulatory
Diagnostic agent approved in Japan; not FDA-approved
Veterinary Use (Pets)
No established veterinary protocol for GHRP-2. Consult a licensed veterinarian before considering off-label use in any species.
Full veterinary reference →Functional Groups
Cited Works
- Bowers CY. GH releasing peptides — clinical use. J Clin Endocrinol Metab. 1996;81:1577.source