Enter your Selank vial size and the volume of bacteriostatic water you are adding. The calculator returns the concentration in mcg/ml and the exact units to draw on a U-100 insulin syringe. It works for the common 5mg and 10mg vials, whether you use Selank subcutaneously or as a nasal solution.
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Results
Concentration
2500 mcg/ml
2.5 mg/ml
Volume to inject
0.12 ml
per dose
Units on insulin syringe (U-100)
12 units
on a standard 100-unit insulin syringe
Doses per vial
16 doses
at 300 mcg each
How this is calculated
5mg × 1,000 = 5000 mcg total
5000 ÷ 2ml = 2500 mcg/ml
300 mcg ÷ 2500 = 0.12 ml
0.12 ml × 100 = 12 units
Disclaimer: This calculator is provided for informational purposes only. Always verify results against your specific vial labelling before use. Peptidy does not provide medical advice — consult a qualified healthcare professional before beginning or modifying any protocol. Use of research peptides may be subject to legal restrictions in your jurisdiction.
Selank is a short peptide researched for anxiety and cognition. It is used both subcutaneously and intranasally, typically in the low-microgram range. The reconstitution concentration (mcg/ml) is the same regardless of route — it just tells you how strong each millilitre of solution is.
Ranges commonly reported in research use. Selank is frequently used intranasally, in which case the same concentration figure tells you the strength per drop or spray.
| Common dose | 250–300 mcg per administration |
| Typical frequency | once or twice daily |
Worked example: 5mg vial + 2ml BAC water, 300mcg dose
2ml gives 2,500 mcg/ml, so a 300mcg dose is 0.12ml = 12 units. For intranasal use, the same concentration tells you how many mcg are in each drop or measured spray.
With a 5mg vial reconstituted in 2ml (2,500 mcg/ml): 300 ÷ 2,500 = 0.12ml = 12 units. Enter your own vial size and water volume above for an exact figure.
Yes. The calculator gives you the concentration in mcg/ml, which applies however you administer the solution. For nasal use you would divide that concentration across your drops or spray volume rather than drawing units on a syringe.
Refrigerate at 2–8°C away from light and label the vial with the date. Reconstituted Selank is commonly used within 2–4 weeks. Do not freeze it.
Store your vial concentration, log every dose against it, and never lose track of what you injected or when.