Selank Dosage Calculator: Reconstitution and Units

To calculate a Selank dose, divide vial mg by BAC water mL for concentration (mg/mL), then divide your target dose by concentration for draw volume (mL). Multiply mL by 100 for U-100 units. Selank doses typically range from 250–750 mcg per administration.

Example Selank Dosage Table

Common vial and BAC water combinations with calculated concentration, draw volume, and U-100 syringe units. For education only — verify your vial label before use.

Vial (mg)	BAC water (mL)	Concentration	Dose (mg)	Draw (mL)	U-100 units
5 mg	2 mL	2.5 mg/mL	0.25 mg	0.1 mL	10 units
5 mg	2 mL	2.5 mg/mL	0.5 mg	0.2 mL	20 units
10 mg	5 mL	2 mg/mL	0.25 mg	0.125 mL	12.5 units
10 mg	5 mL	2 mg/mL	0.75 mg	0.375 mL	37.5 units

How to Calculate Selank Dosage

Three steps convert any vial and BAC water combination into the exact volume to draw on a U-100 insulin syringe.

Step 1 — Calculate concentration (mg/mL)
Divide the total peptide in the vial (mg) by the volume of BAC water you added (mL). For example: a 5 mg Selank vial reconstituted with 2 mL BAC water gives 5 ÷ 2 = 2.5 mg/mL.
Step 2 — Calculate draw volume (mL)
Divide your target dose (mg) by the concentration (mg/mL). For a 0.5 mg dose at 2.5 mg/mL: 0.5 ÷ 2.5 = 0.2 mL. This is the exact volume to draw into the syringe.
Step 3 — Convert to U-100 syringe units
Multiply the draw volume (mL) by 100. For 0.2 mL: 0.2 × 100 = 20 U-100 units. Read this number on the unit markings of a standard insulin syringe.

Dosage Formula

Concentration formula

Concentration (mg/mL) = Vial mg ÷ BAC water mL

Draw volume formula

Draw volume (mL) = Dose (mg) ÷ Concentration (mg/mL)

U-100 syringe units

U-100 units = Draw volume (mL) × 100

These three formulas apply to any Selank vial, regardless of size. U-100 is the standard insulin-syringe scale: 100 units = 1 mL.

Selank Calculator Tool

Enter your vial strength, BAC water volume, and target dose below. The calculator outputs concentration (mg/mL), draw volume (mL), and U-100 units. Educational and research use only.

Example Selank Calculations

Step-by-step worked examples using common vial sizes. Results are for illustrating the math only.

5 mg vial + 2 mL BAC + 250 mcg (0.25 mg) dose

Vial: 5 mg | BAC water: 2 mL | Target dose: 0.25 mg
Concentration: 5 ÷ 2 = 2.5 mg/mL
Draw volume: 0.25 ÷ 2.5 = 0.1 mL
U-100 units: 0.1 × 100 = 10 units

10 mg vial + 5 mL BAC + 500 mcg (0.5 mg) dose

Vial: 10 mg | BAC water: 5 mL | Target dose: 0.5 mg
Concentration: 10 ÷ 5 = 2 mg/mL
Draw volume: 0.5 ÷ 2 = 0.25 mL
U-100 units: 0.25 × 100 = 25 units

Selank Reconstitution Guide

Selank is supplied as a lyophilized powder in 5 mg or 10 mg vials.

Add BAC water slowly along the vial wall. Swirl gently — do not shake.
Common setup: 5 mg vial + 2 mL BAC = 2.5 mg/mL. Each 0.25 mg (250 mcg) dose = 0.1 mL = 10 units.
Refrigerate at 2–8 °C once reconstituted. Use within 4 weeks.

Frequently Asked Questions

What is Selank?

Selank is a synthetic analog of the immunomodulatory peptide tuftsin, studied for anxiolytic and nootropic properties in research. It is not approved for clinical use in most countries.

How does Selank compare to Semax?

Both are nootropic peptides studied in Russia. Selank is primarily researched for anxiolytic effects via GABA modulation, while Semax is studied for cognitive enhancement via BDNF and neurotrophic pathways.

What are U-100 syringe units?

U-100 is the standard scale for insulin syringes. 100 units = 1.0 mL. That means 10 units = 0.1 mL, 50 units = 0.5 mL. Multiply any draw volume in mL by 100 to get the U-100 units reading.

Do I need to recalculate if I change the amount of BAC water?

Yes. Changing BAC water volume changes the concentration (mg/mL), which changes the draw volume for the same mg dose. Always recalculate using: concentration = vial mg ÷ BAC water mL, then draw volume = dose mg ÷ concentration.

How do I convert mcg to mg for the calculator?

Divide mcg by 1000 to get mg. For example: 250 mcg = 0.25 mg, 500 mcg = 0.5 mg, 1000 mcg = 1 mg. Enter the mg value in the calculator.

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For educational and research purposes only. Not medical advice. Consult a licensed healthcare professional before making any medical or health-related decisions.