How much bacteriostatic water do I add to a 100 mcg IGF-1 LR3 vial?

There is no single right amount. More water makes each draw bigger and easier to measure; less water keeps the volume small. With 2 mL, a 100 mcg vial is 50 mcg/mL, so every 10 units on a U-100 insulin syringe holds 5 mcg. With 1 mL it is 100 mcg/mL (10 mcg per 10 units). With 3 mL it is 33.3 mcg/mL (3.333 mcg per 10 units). With 5 mL it is 20 mcg/mL (2 mcg per 10 units).

How many units is 50 mcg of IGF-1 LR3 from a 100 mcg vial?

With 2 mL of water the vial is 50 mcg/mL, so 50 mcg is 1 mL, or 100 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 50 mcg draws are in a 100 mcg IGF-1 LR3 vial?

2 (100 mcg ÷ 50 mcg), whatever volume of water you add. In practice a little is lost to the syringe dead space and the last drops in the vial.

IGF-1 LR3 100 mcg Reconstitution: BAC Water & Units

Short answer: 2 mL of bacteriostatic water in a 100 mcg IGF-1 LR3 vial makes 50 mcg/mL. On a U-100 insulin syringe (1 mL = 100 units), every 10 units then holds 5 mcg. More water gives a weaker solution and a bigger draw for the same amount; the amount in the vial stays 100 mcg.

Water volume chart for a 100 mcg vial

100 mcg IGF-1 LR3 vial, U-100 insulin syringe.
Water added	Concentration	Per 10 units	Per 1 unit
1 mL	100 mcg/mL	10 mcg	1 mcg
2 mL	50 mcg/mL	5 mcg	0.5 mcg
3 mL	33.3 mcg/mL	3.333 mcg	0.333 mcg
5 mL	20 mcg/mL	2 mcg	0.2 mcg

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 100 mcg vial.
Water added	25 mcg	50 mcg	100 mcg
1 mL	25 units	50 units	100 units
2 mL	50 units	100 units	over 1 mL
3 mL	75 units	over 1 mL	over 1 mL
5 mL	over 1 mL	over 1 mL	over 1 mL

A 100 mcg vial holds 4 draws of 25 mcg, 2 draws of 50 mcg, 1 draw of 100 mcg, no matter how much water you add.

The math

Concentration. 100 mcg ÷ 2 mL = 50 mcg/mL
Volume to draw. amount ÷ 50 mcg/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.

Other IGF-1 LR3 vial sizes

IGF-1 LR3 1 mg

Half-life, time to peak and sources are on the main IGF-1 LR3 guide.

IGF-1 LR3 100 mcg reconstitution: how much water and how many units

Water volume chart for a 100 mcg vial

Syringe units by amount

The math

Other IGF-1 LR3 vial sizes

Frequently asked questions