How much bacteriostatic water do I add to 5mg of Semaglutide?

The standard protocol is to add 2 ml of bacteriostatic water to a 5 mg vial of Semaglutide. This produces a concentration of 2.50 mg/ml (2500 mcg/ml). Adjust the water volume down if you want a more concentrated solution for smaller syringe volumes, or up if you prefer easier-to-read markings.

What is the standard dose of Semaglutide after reconstitution?

A common Semaglutide research dose is 250 mcg per administration. At a concentration of 2.50 mg/ml, this equals approximately 10.0 IU on a 100-unit insulin syringe (0.100 ml per dose). Always confirm your dose against your protocol — this is a starting reference only.

How long does reconstituted Semaglutide last in the fridge?

Reconstituted Semaglutide in bacteriostatic water typically remains stable for 56 days refrigerated at 2–8°C (36–46°F). BAC water contains 0.9% benzyl alcohol as a preservative. Never freeze, never leave at room temperature, and discard if the solution becomes cloudy or discolored.

What concentration does 5mg Semaglutide in 2ml water give?

5 mg of Semaglutide reconstituted in 2 ml of BAC water produces a concentration of 2.50 mg/ml, which equals 2500 mcg/ml. This vial yields roughly 20 full doses at 250 mcg per administration.

Can I use sterile water instead of BAC water for Semaglutide?

You can, but it is not recommended for multi-dose vials. Sterile water has no benzyl alcohol preservative, so reconstituted Semaglutide must be used within 24 hours. BAC water allows the vial to last 56 days refrigerated. Use sterile water only if you plan to finish the entire vial in a single session.

How much bacteriostatic water do I add to 5mg of Semaglutide?

The standard protocol is to add 2 ml of bacteriostatic water to a 5 mg vial of Semaglutide. This produces a concentration of 2.50 mg/ml (2500 mcg/ml). Adjust the water volume down if you want a more concentrated solution for smaller syringe volumes, or up if you prefer easier-to-read markings.

What is the standard dose of Semaglutide after reconstitution?

A common Semaglutide research dose is 250 mcg per administration. At a concentration of 2.50 mg/ml, this equals approximately 10.0 IU on a 100-unit insulin syringe (0.100 ml per dose). Always confirm your dose against your protocol — this is a starting reference only.

How long does reconstituted Semaglutide last in the fridge?

Reconstituted Semaglutide in bacteriostatic water typically remains stable for 56 days refrigerated at 2–8°C (36–46°F). BAC water contains 0.9% benzyl alcohol as a preservative. Never freeze, never leave at room temperature, and discard if the solution becomes cloudy or discolored.

What concentration does 5mg Semaglutide in 2ml water give?

5 mg of Semaglutide reconstituted in 2 ml of BAC water produces a concentration of 2.50 mg/ml, which equals 2500 mcg/ml. This vial yields roughly 20 full doses at 250 mcg per administration.

Can I use sterile water instead of BAC water for Semaglutide?

You can, but it is not recommended for multi-dose vials. Sterile water has no benzyl alcohol preservative, so reconstituted Semaglutide must be used within 24 hours. BAC water allows the vial to last 56 days refrigerated. Use sterile water only if you plan to finish the entire vial in a single session.

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How to Reconstitute Semaglutide

Pre-filled calculator with standard defaults for Semaglutide: 5 mg vial in 2 ml BAC water.

Standard Semaglutide Reconstitution Protocol

Add 2 ml of bacteriostatic water to a 5 mg vial of Semaglutide. This gives a concentration of 2.50 mg/ml. A standard 250 mcg dose equals about 10.0 IU on a 100-unit insulin syringe. Store refrigerated at 2–8°C and use within 56 days.

Vial Size

BAC Water

Desired Dose

mcg

Concentration

2.50

mg/ml

2500 mcg/ml

Dose Volume

0.100

Per dose

Syringe Draw

10.0

100-unit insulin syringe

Doses per Vial

doses

20.0 exact

Draw to

100

10.0 units

Draw to this line

Semaglutide Reconstitution Chart

Common syringe draws at the standard Semaglutide preset (5 mg in 2 mL BAC water = 2.50 mg/mL). Units are on a U-100 insulin syringe (100 units = 1 mL). For laboratory research reference only.

Syringe units (U-100)	Volume	Amount (Semaglutide)
5 units	0.05 mL	125 mcg
10 units	0.10 mL	250 mcg
15 units	0.15 mL	375 mcg
20 units	0.20 mL	500 mcg
25 units	0.25 mL	625 mcg
30 units	0.30 mL	750 mcg
40 units	0.40 mL	1.00 mg
50 units	0.50 mL	1.25 mg

Change the vial size or BAC water above to recompute the chart for a different Semaglutide preset. This chart shows reconstitution math, not a dosing recommendation.

Step-by-Step: How to Reconstitute Semaglutide

1

Gather your supplies

A sealed 5 mg vial of Semaglutide, a vial of bacteriostatic water, a 1 ml (100-unit) insulin syringe, and an alcohol swab.
2

Inject the water

Wipe both vial stoppers with alcohol. Draw 2 ml of BAC water into the syringe and inject it slowly down the inside wall of the Semaglutide vial. Never spray directly onto the powder — the force can damage the peptide.
3

Swirl gently

Gently swirl the vial in a circular motion until the Semaglutide fully dissolves. Do not shake. The solution should become clear.
4

Calculate your dose

At a concentration of 2.50 mg/ml, a 250 mcg (0.250 mg) dose equals about 10.0 IU on a 100-unit insulin syringe.
5

Draw and store

Draw your dose, perform the injection, and immediately return the vial to the refrigerator at 2–8°C. Use the reconstituted vial within 56 days.

These defaults reflect the most common community protocols for Semaglutide. Individual research protocols may differ. Always verify against your source and consult a qualified practitioner before any injection. BodyHackGuide publishes for research and educational purposes only.

Semaglutide Reconstitution FAQ

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