How many units of Selank should I draw?

It depends on your vial size, BAC water, and dose. For a 5mg vial with 2mL BAC water, a beginner dose of 250mcg is typically 10 units on a U-100 syringe. Use the calculator above for your exact numbers.

How much BAC water should I add to Selank?

The standard amount is 2mL of bacteriostatic water for a 5mg vial. More water gives a more dilute solution — easier to measure small doses. Less water means fewer injections per vial. Adjust the BAC water slider in the calculator to see how it changes your syringe units.

How long does a Selank vial last?

At a beginner dose of 250mcg daily, a 5mg vial lasts about 20 doses. The calculator shows exact doses per vial for your selected tier.

What syringe should I use for Selank?

Most people use a U-100 insulin syringe (1mL / 100 units). For very small doses, a U-50 or U-30 syringe gives better precision. The calculator adjusts units automatically for whichever syringe you pick.

Selank Dosage Calculator

CognitiveInjection/NasalResearch~2-3 min half-life

Selank is a synthetic peptide based on the naturally occurring immune molecule tuftsin, developed at the Institute of Molecular Genetics in Russia.

Reduces anxiety without sedation or addictionEnhances cognitive function and memoryIncreases BDNF (brain growth factor)Modulates serotonin naturally

Vial Size

BAC Water (mL)

Dosing Level

250mcg · Daily

Custom Dose (mcg) — optional

Syringe Type

10.0 units

100 units (1mL)

Concentration

2,500

mcg/mL

Draw Volume

0.100

Syringe Units

10.0

units

Doses / Vial

doses

Summary: Add 2mL BAC water to your 5mg vial. Draw to 10.0 units on a U-100 syringe for a 250mcg dose. This vial will last 20 doses.

Cycle Planner

Cycle Length (weeks)

Price Per Vial ($) — optional

Subcutaneous or Nasal. Typical beginner frequency: daily.

Selank Pharmacokinetics

Pharmacokinetics — Active Dose Over Time

t½ = ~2-3 min (IV)

After 1 half-life (3m): 50% remainsAfter 2 half-lives (5m): 25% remainsAfter 3 half-lives (8m): 12.5% remains

At a 500mcg dose: 50% = 250mcg remaining after 3m. Recommended frequency: Daily.

Disclaimer: This curve is a simplified first-order exponential decay model. Actual pharmacokinetics vary based on injection site, individual metabolism, body composition, and other factors. Half-life values are approximate and based on available preclinical and clinical literature. Many research peptides lack formal human pharmacokinetic studies. This is for educational purposes only — not medical advice.

Selank Dosing Protocol

Level	Dose / Injection	Frequency
Beginner	250mcg	Daily
Moderate	500mcg	Daily
Aggressive	750mcg	2x Daily

Note: Anxiolytic peptide. Tuftsin analog. Also available as nasal spray. Modulates BDNF and serotonin.

About Selank

Selank is a synthetic peptide based on the naturally occurring immune molecule tuftsin, developed at the Institute of Molecular Genetics in Russia. It's a potent anxiolytic (anti-anxiety) that modulates serotonin, BDNF (brain-derived neurotrophic factor), and enkephalins without the sedation or addiction risk of benzodiazepines. It enhances cognitive function, reduces anxiety, and supports immune function simultaneously.

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