How much bacteriostatic water do I add to a 6 mg sermorelin 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 6 mg vial is 3 mg/mL, so every 10 units on a U-100 insulin syringe holds 300 mcg. With 1 mL it is 6 mg/mL (600 mcg per 10 units). With 3 mL it is 2 mg/mL (200 mcg per 10 units). With 5 mL it is 1.2 mg/mL (120 mcg per 10 units).

How many units is 200 mcg of sermorelin from a 6 mg vial?

With 2 mL of water the vial is 3 mg/mL, so 200 mcg is 0.067 mL, or 6.7 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 200 mcg draws are in a 6 mg sermorelin vial?

30 (6 mg ÷ 200 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.

Sermorelin 6 mg Reconstitution: BAC Water & Units

Short answer: 2 mL of bacteriostatic water in a 6 mg sermorelin vial makes 3 mg/mL. On a U-100 insulin syringe (1 mL = 100 units), every 10 units then holds 300 mcg. More water gives a weaker solution and a bigger draw for the same amount; the amount in the vial stays 6 mg.

Water volume chart for a 6 mg vial

6 mg sermorelin vial, U-100 insulin syringe.
Water added	Concentration	Per 10 units	Per 1 unit
1 mL	6 mg/mL	600 mcg	60 mcg
2 mL	3 mg/mL	300 mcg	30 mcg
3 mL	2 mg/mL	200 mcg	20 mcg
5 mL	1.2 mg/mL	120 mcg	12 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 6 mg vial.
Water added	100 mcg	200 mcg	400 mcg
1 mL	under 2 units	3.3 units	6.7 units
2 mL	3.3 units	6.7 units	13.3 units
3 mL	5 units	10 units	20 units
5 mL	8.3 units	16.7 units	33.3 units

A 6 mg vial holds 60 draws of 100 mcg, 30 draws of 200 mcg, 15 draws of 400 mcg, no matter how much water you add.

The math

Concentration. 6 mg ÷ 2 mL = 3 mg/mL
Volume to draw. amount ÷ 3 mg/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 sermorelin vial sizes

Sermorelin 2 mg · Sermorelin 9 mg

Half-life, time to peak and sources are on the main Sermorelin guide.

Sermorelin 6 mg reconstitution: how much water and how many units

Water volume chart for a 6 mg vial

Syringe units by amount

The math

Other sermorelin vial sizes

Frequently asked questions