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For research and educational purposes only. Not intended for human consumption.

Selank

Well Researched
Updated Dec 2025

Synthetic Tuftsin Analog | Anxiolytic & Nootropic Peptide

InjectableNasal
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250-500mcg
1-2x daily
Injectable
Abdomen
2-8 weeks
Typical duration
2-8°C
Refrigerated

Overview

What is Selank?

Selank is a synthetic heptapeptide analog of the naturally occurring immune peptide tuftsin, developed by the Russian Academy of Sciences. This anxiolytic and nootropic peptide has been extensively studied for its ability to reduce anxiety, enhance cognitive function, and modulate immune responses without the side effects associated with traditional benzodiazepines. Clinical trials with 62+ patients demonstrate anxiolytic effects equivalent to medazepam without sedation, with additional immunomodulatory benefits including CD4+/CD8+ T cell ratio normalization.

Key Benefits

Benzodiazepine-equivalent anxiolytic effects without sedation or dependency (proven in 62-patient trials), enhanced BDNF expression, improved stress resilience, cognitive enhancement, immune modulation with CD4+/CD8+ normalization, enhanced NK cell activity, no tolerance or withdrawal, and neuroprotective effects.

Mechanism of Action

Positive allosteric modulation of GABA-A receptors (blocking benzodiazepine modulatory activity non-cumulatively), serotonin and dopamine system optimization, enkephalin degradation inhibition, IL-6 and cytokine balance regulation, BDNF upregulation in hippocampus, and Bcl6 gene expression for immune development.

Molecular Information

751.89 Da
Weight
7
amino acids
Tuftsin analog
Type
Amino Acid Sequence:
Thr-Lys-Pro-Arg-Pro-Gly-Pro
* Synthetic analog of tuftsin with anxiolytic properties

Pharmacokinetics

Peak
15-30 min (intranasal)
Half-life
2-30 min (variable)
Cleared
Effects persist hours
100%50%0%0h6h12h18h24h
Peak
Half-life
Cleared
60-80% intranasal bioavailability - Russian data

Research Indications

Generalized Anxiety Disorder

Clinical trials demonstrate significant reduction in anxiety symptoms comparable to benzodiazepines but without sedation, amnesia, or dependence.

Post-Traumatic Stress Disorder

Emerging research shows effectiveness in PTSD treatment, helping stabilize stress responses and emotional regulation.

Social Anxiety and Performance Stress

Reduces anticipatory anxiety and social stress while maintaining cognitive clarity.

Research Protocols

Disclaimer: Selank is approved in Russia for various conditions. These protocols are for research purposes. Consult a healthcare provider before use.

GoalDoseFrequencyRoute
Mild anxiety relief250mcg dailyOnce dailySubQ injection
Moderate anxiety/cognitive enhancement250mcg twice dailyMorning and eveningSubQ injection
Intensive anxiety/stress management500mcg dailyDivided dosesSubQ injection
Cognitive enhancement/nootropic use250-350mcg dailyMorning onlySubQ injection
PTSD/trauma support250mcg twice dailyConsistent timingSubQ injection

Timing: Selank can be injected any time of day. Morning injection may provide better cognitive benefits, while evening injection may enhance relaxation and sleep quality.

Peptide Interactions

How to Reconstitute

Important: Always use bacteriostatic water (BAC). Sterile technique is essential.

1

Remove Selank vial from refrigeration and allow to reach room temperature for 10-15 minutes

2

Clean vial tops with alcohol wipes

3

Calculate appropriate reconstitution volume based on desired concentration

4

Draw calculated amount of bacteriostatic water into insulin syringe

5

Insert needle into Selank vial at 45-degree angle against the glass wall

6

Slowly inject BAC water down the side of the vial to minimize foaming

7

Gently swirl vial - NEVER shake vigorously

8

Final solution should be clear and colorless

9

Label vial with reconstitution date and concentration

10

Store in refrigerator immediately, use within 30 days

Dosing Calculator

Calculate your injection volume with visual dosing guide

FINAL CONCENTRATION
2.50mg/mL
Each milliliter contains 2.50 mg of peptide
VISUAL REFERENCE (RESEARCH USE ONLY)

To obtain 250 mcg from this solution:

Draw 0.10 mL=10 units

(1 mL = 100 units on any insulin syringe)

0102030405060708090100
00.10.20.30.40.50.60.70.80.91.0
0.10 mL
10 units

Draw to this mark for 250 mcg

This calculator is for research purposes only. Always verify calculations and consult protocols.

Quality Indicators

White to Off-White Powder

High-quality Selank appears as light, fluffy lyophilized powder without clumping.

Clear Reconstituted Solution

Properly reconstituted Selank should be completely clear and colorless.

Proper Labeling and Batch Information

Legitimate Selank includes clear peptide sequence, purity testing, and batch numbers.

Yellowing, Clumping, or Moisture Exposure

Discolored, clumped, or damp powder indicates degradation.

Persistent Cloudiness After Reconstitution

Cloudiness indicates peptide aggregation or contamination.

Unusual Smell or Burning Sensation

Fresh Selank should be odorless - strong smells may indicate contamination.

What to Expect

  • Mild anxiety reduction within 30-60 minutes of injection
  • Improved mental clarity and focus within 1-3 days
  • Enhanced stress resilience and emotional stability by week 1
  • Better sleep quality and reduced nervous tension
  • Cognitive enhancement effects peak around 1-2 weeks
  • No sedation, drowsiness, or cognitive impairment
  • Sustained benefits may last several days after discontinuation

Side Effects & Safety

Side Effects

  • Start with lowest effective dose (250mcg) to assess individual response
  • Selank has excellent safety profile with minimal reported side effects
  • No known tolerance, dependence, or withdrawal issues reported
  • Can be safely combined with most medications under medical supervision
  • Store properly refrigerated to maintain peptide stability
  • Use sterile injection techniques to prevent infection

When to Stop

  • Allergic reactions
  • Severe mood changes
  • Unusual symptoms
  • If taking multiple psychiatric medications
  • Consult healthcare provider

References

6 Studies

GAD Clinical Trial (62 Patients)

Human | GAD and neurasthenia | Multi-week treatment | Benzodiazepine-equivalent efficacy

Russian clinical trials involving 62 patients with generalized anxiety disorder showed Selank produced anxiolytic effects equivalent to medazepam while avoiding sedation and cognitive impairment.

Expanded GAD Trial (30 Patients)

Human | Multiple psychometric scales | 21 days intranasal | Significant symptom reduction

Demonstrated significant decreases in GAD symptom severity and duration using CGI, Zung, and Hamilton scales, with improved quality of life and no typical benzodiazepine side effects.

Immune Normalization in Anxiety Patients

Human | Anxiety disorder patients | Immune markers | Immunomodulatory effects

Clinical studies documented Selank normalized dysregulated immune parameters, including restoration of CD4+/CD8+ T cell ratios and enhancement of natural killer cell activity.

Quick Start Guide

Typical Dose
250-500mcg daily
How Often
Once daily morning, or split twice daily
Where to Inject
Abdomen
Timing
Morning for cognitive benefits, evening for anxiety
Effects Timeline
Anxiety relief 30-60 min, cognitive effects 1-3 days, peak 1-2 weeks
Storage
Refrigerate 2-8°C, protect from light and heat
Cycle Length
2-8 weeks, break not required but recommended
Break Between
1-2 weeks between cycles (optional)

Research Disclaimer

Selank is sold for laboratory research purposes only and is not intended for human or animal consumption. The information provided on this page is compiled from published research, veterinary studies, and anecdotal reports for educational purposes. This content does not constitute medical advice, diagnosis, or treatment recommendations. Any research involving Selank must comply with all applicable local, state, and federal regulations. BioInfinity Lab makes no claims regarding the safety or efficacy of Selank for any purpose. Consult qualified professionals for any research applications.