GHRP-2

Pralmorelin · KP-102 · GPA-748

A synthetic growth hormone releasing peptide that mimics ghrelin, used in Japan as a diagnostic agent for growth hormone deficiency.

Research use only. This compound is sold for laboratory research and is not approved by the FDA for human use. Everything below is reference information about what circulating protocols state — not a recommendation to use it.

At a glance

Category: Growth Hormone
Half-life: Not characterised
Typical vial sizes: 5 mg · 10 mg
Commonly cited dose: 100–300 mcg
Frequency: one to three times daily
Routes: Subcutaneous

A 5 mg vial, worked through.

Reconstituting a 5 mg vial of GHRP-2 with 2 mL of bacteriostatic water gives 2.5 mg/mL. A 100 mcg dose is then:

4units(0.04 mL) — about 50 doses per vial

Storage

Lyophilised (unmixed): Refrigerated; keep dry and protected from light.
Reconstituted: Refrigerate at 2-8C. Commonly cited as usable for ~30 days.

What people log it against

Outcomes users commonly track alongside this compound. Listing them is not a claim that it produces them.

Growth hormone response tracking
Appetite tracking

References

Each source below establishes only the specific claim noted with it, last checked 2026-08-14. Dose ranges, frequencies and storage times reflect what circulating protocols commonly state and are not established by these references.

Pralmorelin drug monograph, Drugs R&D 2004 — PMID 15230633
Development monograph. Establishes the diagnostic use and the GH peak cut-off of 15.0 mcg/L separating GH-deficient patients from healthy controls. States NO elimination half-life, which is why halfLifeHours is null here.
Laferrere et al., J Clin Endocrinol Metab 2005 — PMID 15699539
Subcutaneous infusion of 1 mcg/kg/h for 270 min in 7 lean healthy men increased ad libitum food intake. Establishes the appetite effect in humans; measures response, not peptide clearance.

Run your own numbers

Pick GHRP-2 from the preset list to start from a typical vial.

Your vial

Peptide in vial

As printed on the vial label

Bacteriostatic water added

How much you inject into the vial

Dose you want

mcg

1000 mcg = 1 mg

Syringe size

Start from a peptide

Fills in a common vial size and the low end of commonly cited protocols. Always check against your own vial.

Draw this much

5units

on a 1 mL U-100 insulin syringe

Concentration: 5 mg/mL
Volume: 0.05 mL
Doses in this vial: 40

Keep this vial. VialPal holds the concentration, counts down the doses left in it, and logs the ones you actually took.

VialPal does the arithmetic — it does not tell you what to take. Dose decisions belong between you and a qualified clinician.