GHRP-2 Reconstitution Calculator

What is GHRP-2?

GHRP-2 is a synthetic hexapeptide belonging to the second-generation growth hormone releasing peptide (GHRP) class. Published research has studied its agonism at the ghrelin / growth hormone secretagogue receptor and its effect on pulsatile growth hormone release. Compared to ipamorelin, GHRP-2 has been reported in the literature to produce larger effects on cortisol and prolactin. It has been investigated for its orexigenic (appetite-stimulating) properties as well. GHRP-2 is not approved by the FDA for human use. Research-grade GHRP-2 is sold only as a laboratory reagent.

Common vial sizes

Research vendors typically offer GHRP-2 in 5 mg or 10 mg lyophilized vials. Reconstitution with 2–3 mL of bacteriostatic water is common.

• 5 mg vial
• 10 mg vial

Reconstitution examples

Worked examples showing exactly what a given vial, bacteriostatic water volume, and target dose produce in syringe units. All math is from the same calculator above.

• 5 mg vial + 2 mL bacteriostatic water → 2500 mcg/mL concentration.
  A 100 mcg dose = 4 units on a u-100 insulin, 1 ml (100 units) (0.04 mL).
• 5 mg vial + 2 mL bacteriostatic water → 2500 mcg/mL concentration.
  A 200 mcg dose = 8 units on a u-100 insulin, 1 ml (100 units) (0.08 mL).
• 10 mg vial + 3 mL bacteriostatic water → 3333.33 mcg/mL concentration.
  A 200 mcg dose = 6 units on a u-100 insulin, 1 ml (100 units) (0.06 mL).
• 5 mg vial + 2 mL bacteriostatic water → 2500 mcg/mL concentration.
  A 300 mcg dose = 12 units on a u-100 insulin, 1 ml (100 units) (0.12 mL).

Storage & shelf life

Lyophilized GHRP-2 is typically stored refrigerated at 2–8 °C. Reconstituted solutions are generally kept refrigerated and protected from light.

Reported half-life

Published pharmacokinetic work reports a plasma half-life of approximately 15–60 minutes for GHRP-2.