Selank Reconstitution & Dosage Calculator
This free Selank calculator turns your vial size, the bacteriostatic water you add, and your target amount into a concentration, a draw volume, and the exact units on a U-100 insulin syringe. Selank is a synthetic analog of the immunomodulatory peptide tuftsin, developed in Russia and studied alongside Semax as an anxiolytic research peptide. This is a measurement tool — it does not recommend an amount.
Selank reconstitution calculator
Syringe
U-100 insulinPeptide in vial
Target amount
Bacteriostatic water
Email this result to yourself
Quick summary
- Converts vial size (mg), bacteriostatic water (mL), and a microgram amount into concentration, draw volume, and U-100 units.
- Reference math for the 10 mg vial Selank is supplied in, standalone or blended with Semax.
- Educational research and measurement tool only — it does not diagnose, treat, or recommend an amount.
What this Selank calculator does
This calculator does one job well: it turns your vial size, the amount of bacteriostatic water you add, and your target amount into a concentration (mg/mL), a draw volume (mL), and the matching units on a U-100 insulin syringe. Change any input and the result updates instantly.
Selank ships as a freeze-dried powder. Before it can be measured into a syringe it has to be reconstituted — dissolved in bacteriostatic water. How much water you add sets the concentration, and the concentration sets how many units each amount works out to. The presets above cover the most common Selank vial setups; use the custom fields for anything else.
How to use the Selank calculator
Pick your syringe
Choose the U-100 insulin syringe you'll draw with. Smaller syringes (0.3 mL / 30u) have finer lines, which helps when the draw is small.
Enter your vial and water
Set the milligrams in your Selank vial and the bacteriostatic water you added. Together these set the concentration.
Set your target amount
Toggle mg or mcg and pick (or type) the amount you're measuring for. The calculator does the conversion for you.
Read the draw
The result panel shows concentration, draw volume, and the exact U-100 units to pull, plus how many doses your vial contains.
Selank reconstitution math, explained
The math is short. Concentration = vial size ÷ bacteriostatic water. Draw volume = target amount ÷ concentration. Units = draw volume × 100 (a U-100 syringe reads 100 units per mL). The table below shows common Selank setups and the units for a 1 mg amount at each.
| Vial size | Bac water | Concentration | Units per 1 mg |
|---|---|---|---|
| 10 mg | 1.0 mL | 10 mg/mL | 10 units |
| 10 mg | 2.0 mL | 5 mg/mL | 20 units |
| 10 mg | 2.5 mL | 4 mg/mL | 25 units |
| 10 mg | 4.0 mL | 2.5 mg/mL | 40 units |
| 5 mg | 2.0 mL | 2.5 mg/mL | 40 units |
Selank amount-to-units reference
How common amounts convert to U-100 syringe units at two example concentrations. These are arithmetic conversions for reference, not a recommendation of any amount.
| Amount | Volume (mL) | U-100 units |
|---|---|---|
| 250 mcg (0.25 mg) | 0.05 mL | 5 units |
| 500 mcg (0.5 mg) | 0.1 mL | 10 units |
| 750 mcg (0.75 mg) | 0.15 mL | 15 units |
| 1000 mcg (1 mg) | 0.2 mL | 20 units |
| Amount | Volume (mL) | U-100 units |
|---|---|---|
| 250 mcg (0.25 mg) | 0.1 mL | 10 units |
| 500 mcg (0.5 mg) | 0.2 mL | 20 units |
| 750 mcg (0.75 mg) | 0.3 mL | 30 units |
| 1000 mcg (1 mg) | 0.4 mL | 40 units |
Mixing, color & storage tips
Injection and intranasal both appear in the literature
Much of the published Selank work uses an intranasal route rather than injection, where the relevant figure is a concentration per drop rather than syringe units. This calculator computes the reconstitution and unit math; if you are working intranasally, the concentration column is the number you want.
Mixing without foam
Add the bacteriostatic water slowly against the inside wall of the vial and swirl gently until clear. Do not shake.
Storage
Keep the dry powder cold and dark. Refrigerate once reconstituted, keep it out of light, and plan around a limited usable window. Do not freeze a mixed vial.
Selank and Semax together
The two are frequently supplied as a combined vial because they were developed in the same research programme and are studied together. A blended vial delivers both components in a fixed ratio per draw — use the stack calculator for that rather than this page.
Selank supplies checklist
A simple reconstitution shopping list. Confirm vial size and batch documentation before you buy.
Selank
- Batch COA on every vial
- Third-party purity tested
- U.S. fulfillment, discreet shipping
Selank — frequently asked questions
What does this Selank calculator tell me?
It converts your vial size, bacteriostatic water volume, and target amount into concentration in mg/mL, draw volume in mL, and the matching units on a U-100 insulin syringe. It is a measurement tool, not a recommendation.
Is the Selank calculator free?
Yes — free, browser-based, and no account is required.
How much bacteriostatic water do I add to a 10 mg Selank vial?
A 10 mg vial with 2 mL makes 5 mg/mL, so a 500 mcg target is 10 units. Using 4 mL makes 2.5 mg/mL and doubles that to 20 units for the same amount.
How many units is 500 mcg of Selank?
At 5 mg/mL it is 10 units (0.1 mL). At 2.5 mg/mL it is 20 units (0.2 mL). Units always depend on your exact concentration.
What is the difference between Selank and Semax?
Both came out of the same Russian research programme but they have different parent molecules — Selank derives from tuftsin, Semax from ACTH 4-10. They are studied for different primary effects and are sometimes supplied blended in one vial.
How long does a reconstituted Selank vial last?
Refrigerate it, keep it dark, and plan around a limited usable window. Do not freeze a mixed vial; keep the dry powder cold for longer storage.
Is this medical advice?
No. This page and calculator are for education and research planning only. Products referenced are sold strictly as research chemicals and are not for human or veterinary use.
Sources & further reading
Related calculators
Selank protocol & evidence
Dosing for Selank comes from published human trials. The protocol page carries the schedule that was actually administered, with the citation.
