How much bacteriostatic water do I add to a 10 IU HGH vial?

There is no single right amount. More water makes each draw bigger and easier to measure; less water keeps the volume small. With 1 mL, a 10 IU vial is 10 IU/mL, so every 10 units on a U-100 insulin syringe holds 1 IU. With 0.5 mL it is 20 IU/mL (2 IU per 10 units). With 2 mL it is 5 IU/mL (0.5 IU per 10 units). With 3 mL it is 3.3 IU/mL (0.333 IU per 10 units).

How many units is 2 IU of HGH from a 10 IU vial?

With 1 mL of water the vial is 10 IU/mL, so 2 IU is 0.2 mL, or 20 units on a U-100 syringe. With a different water volume the units change but the amount does not. The amount is an example for the math, not a recommendation.

How many 2 IU draws are in a 10 IU HGH vial?

5 (10 IU ÷ 2 IU), whatever volume of water you add. In practice a little is lost to the syringe dead space and the last drops in the vial.

HGH 10 IU Reconstitution: BAC Water & Units

Short answer: 1 mL of bacteriostatic water in a 10 IU HGH vial makes 10 IU/mL. On a U-100 insulin syringe (1 mL = 100 units), every 10 units then holds 1 IU. More water gives a weaker solution and a bigger draw for the same amount; the amount in the vial stays 10 IU.

Water volume chart for a 10 IU vial

10 IU HGH vial, U-100 insulin syringe.
Water added	Concentration	Per 10 units	Per 1 unit
0.5 mL	20 IU/mL	2 IU	0.2 IU
1 mL	10 IU/mL	1 IU	0.1 IU
2 mL	5 IU/mL	0.5 IU	0.05 IU
3 mL	3.3 IU/mL	0.333 IU	0.033 IU

Syringe units by amount

The amounts below are examples to show the conversion, not doses. How much to take is a decision for you and your prescriber.

Units on a U-100 syringe from a 10 IU vial.
Water added	1 IU	2 IU	4 IU
0.5 mL	5 units	10 units	20 units
1 mL	10 units	20 units	40 units
2 mL	20 units	40 units	80 units
3 mL	30 units	60 units	over 1 mL

A 10 IU vial holds 10 draws of 1 IU, 5 draws of 2 IU, 2.5 draws of 4 IU, no matter how much water you add.

How far a 10 IU vial goes

Draws per vial depend only on the amount per draw, not on the water. The volume and units columns use 1 mL of water (10 IU/mL). Example amounts only, not doses.

10 IU vial: draws, volume and units per example amount.
Amount per draw	Draws per vial	Volume per draw	Units per draw
0.5 IU	20	0.05 mL	5 units
1 IU	10	0.1 mL	10 units
2 IU	5	0.2 mL	20 units
4 IU	2.5	0.4 mL	40 units
8 IU	1.3	0.8 mL	80 units

Real counts run a little lower: some liquid stays in the syringe and at the bottom of the vial.

The math

Concentration. 10 IU ÷ 1 mL = 10 IU/mL
Volume to draw. amount ÷ 10 IU/mL = mL
Syringe units. mL × 100 = units

For a different water volume or amount, the free peptide reconstitution calculator works backwards from the amount you want and suggests a water volume that lands on a clean syringe mark.

Half-life, time to peak and sources are on the main HGH (Somatropin) guide.

HGH 10 IU reconstitution: how much water and how many units

Water volume chart for a 10 IU vial

Syringe units by amount

How far a 10 IU vial goes

The math

Frequently asked questions