GHRP-2 reconstitution calculator.
Pre-filled with the 5 mg vial and 2.5 mL of bacteriostatic water the REGEN catalog reports for GHRP-2. Every field is editable.
The numbers for a 5 mg GHRP-2 vial
Reconstituting a 5 mg vial with 2.5 mL of bacteriostatic water gives a concentration of 2 mg/mL. On a U-100 insulin syringe, where one unit is 0.01 mL, that puts 20 mcg in every unit drawn.
A 100 mcg dose at that concentration is 0.05 mL, which is 5 units on the syringe, and the vial holds about 50 of them.
Those are the values the calculator above opens with. The vial size and water volume are the amounts the REGEN catalog reports for GHRP-2; change any field and the arithmetic follows.
What the research reports for GHRP-2
Published protocols for GHRP-2 report 100–300 mcg, 1-3x daily. That is what the literature describes, not a recommendation. The calculator starts at the low end of it. The GHRP-2 reference page carries the evidence grade, the side-effect profile, and the primary sources behind that range.
GHRP-2 reconstitution chart for a 5 mg vial
The same 5 mg of GHRP-2 at four common water volumes. More water does not mean more compound, it spreads the same amount across a bigger volume, so the same dose is drawn to a higher number of units. That is usually the safer direction to be imprecise in: small errors on a longer draw matter proportionally less.
| Bacteriostatic water | Concentration | Per unit (U-100) | Units for 100 mcg |
|---|---|---|---|
| 1 mL | 5 mg/mL | 50 mcg | 2 units |
| 2 mL | 2.5 mg/mL | 25 mcg | 4 units |
| 2.5 mL (catalog) | 2 mg/mL | 20 mcg | 5 units |
| 3 mL | 1.67 mg/mL | 16.7 mcg | 6 units |
| 5 mL | 1 mg/mL | 10 mcg | 10 units |
"Units" here means syringe graduations, not international units. They are unrelated measures that share a name, and conflating them is its own category of mistake. The reconstitution calculator explains the arithmetic behind these columns in full.
More on GHRP-2
The GHRP-2 reference page covers how it works, what the research grade means, side effects, and pharmacokinetics, alongside the rest of the performance compounds. For a different compound, the generic reconstitution calculator takes any vial and dose.