Selank

Lyophilized powder

Selank is a synthetic heptapeptide based on tuftsin, an immune peptide, developed in Russia and studied for anxiety and cognition. Below: today's vial sizes, prices through our link and the vendor's COA details.

Size

$3.15/mg · lot SEL-062026-1 · 99.71% · In stock

Price

$31.50

List

$45.00

Buy 10 mg at Nura Peptide

Price shown uses code thepeptidecatalog at Nura Peptide's checkout (30% off list).

Sold by Nura Peptide as SELANK (Lyophilized) 10mg. The Peptide Catalog does not sell peptides; we earn a commission if you buy through this link, at no extra cost to you. For laboratory research use only, not for human or veterinary use. Not FDA-approved. Nothing on this page is medical or dosing advice.

Selank research vial sold by Nura Peptide as SELANK (Lyophilized) 10mg

Third-party tested≥99.71% reported purityResearch use only

Certificate of AnalysisLot SEL-062026-1 · 99.71%View

Certificate of Analysis published for every lot (Freedom Diagnostics Testing)
Current lots report 99.71% purity or higher
Ships from a U.S. fulfillment center, per Nura Peptide
Lyophilized powder · laboratory research use only

Research-context information only. Selank is a research peptide. Protocols, doses, and reactions reported below come from published research and self-reported community sources. This article reports what has been documented, not what should be done. Consult a licensed physician for personal medical decisions.

Vial sizes listed by the vendor

Selank Vial Sizes, Prices & Lots

Selank vial sizes, prices and lots at Nura Peptide
Size	List	With our code	Per mg	Availability	Lot · purity
10 mg	$45.00	$31.50	$3.15	In stock	SEL-062026-1 · 99.71%

Prices checked today, 6:20 AM CT on Nura Peptide's site, with code thepeptidecatalog applied. Lot data from Nura Peptide's COA page, checked today, 8:03 PM CT. Sizes not re-checked in the last 7 days are hidden. The vendor's checkout is final.

Verified test results

Selank Certificate of Analysis

Nura Peptide publishes a third-party certificate for each lot of SELANK (Lyophilized) 10mg. The figures below are copied from Nura Peptide's current-lot listings, checked today, 8:03 PM CT (refreshed hourly; hidden if older than 24 hours). Match the lot number on the vial to its certificate.

SELANK (Lyophilized) 10mg 10mg
Lot SEL-062026-1
99.71%reported purity
Laboratory
Freedom Diagnostics Testing
Reported
2026-06-14
Accession
Nura2606110402
View full COA at Nura Peptide

All lots on record: Nura Peptide COA library. How to check one: how to verify a peptide COA.

Selank Dosing in Clinical Research

Cognition / Anxiety

Educational reference only. Individual responses vary. Consult healthcare provider before use.

Vial Size

30 mg

Reconstitution

3 ml BAC water

Dose

1 mg (10 units on 1ml syringe)

Timing

Frequency

2-3 days per week

Duration

8 weeks on, 8 weeks off

Protocol Notes

Can be used intranasally or subcutaneously. NA-Selank-Amidate version has enhanced bioavailability.

Why This Dosing Protocol

Why intranasal option?Selank's small size allows nasal administration, which provides rapid onset (15-30 min) and direct CNS access. Injectable is also effective but less convenient for daily use.

Why 2-3x per week (maintenance)? For ongoing anxiety management, intermittent dosing prevents tolerance while maintaining baseline effects. Daily dosing is used for acute anxiety periods.

Full Dosing Guide Reconstitution Calculator Cycle Cost Calculator

How Selank Works

Nootropic Peptide — Anxiolytic / Immune Modulator

Target → GABAergic Modulation → Anxiety Reduction → Outcomes

Target

GABA-A Receptors + Immune System (Tuftsin-Derived)

Selank is a synthetic analog of the immune peptide tuftsin with added anxiolytic properties. It modulates GABA-A receptor activity (the same system targeted by benzodiazepines, but without sedation or dependence) and retains tuftsin's immune-modulating effects.

Cellular Signal

GABAergic Modulation + Enkephalin Stabilization

Selank enhances GABA signaling (calming), stabilizes enkephalins (natural stress buffers), and modulates serotonin metabolism. This multi-pathway action produces anxiolytic effects without the cognitive impairment or addiction risk of benzodiazepines.

Systemic Effect

Reduced Anxiety + Immune Balance

Anxiety reduction without sedation. Improved stress resilience. Enhanced immune cell function (from the tuftsin backbone). Monoamine metabolism normalization supports mood stability.

What You Notice

Calmer Baseline → Clearer Thinking → Better Stress Response

Reduced baseline anxiety and reactivity to stressors. Mental clarity improves as a secondary effect of reduced anxiety (not a direct cognitive enhancer like Semax). No drowsiness or cognitive impairment. Effects often noticeable within 30-60 minutes.

What Makes This Peptide Different

Selank is uniquely positioned as an anxiolytic without sedation or dependence. While Semax is its "cognitive sibling" (focus and drive), Selank targets anxiety and calm. Its dual nature — anxiolytic + immunomodulatory — comes from its tuftsin backbone. The NA-Selank-Amidate version has enhanced bioavailability and duration.

Selank Clinical Evidence

Two parallel grades per outcome — clinical RCT depth and real-world community adoption. See the Research Overview below for citations and detail.

Outcome	Clinical Evidence	Community Evidence
Generalized anxiety disorder (vs benzodiazepine)	Moderate	Moderate
Enkephalin-degrading enzyme inhibition (mechanism)	Moderate	Moderate
Cognitive / nootropic effects in healthy users	Preliminary	Moderate

Selank Research Overview

Outcome-by-outcome look at what the evidence actually supports for Selank, including human vs. animal study counts and our editorial take on each.

Generalized anxiety disorder

Clinical:ModerateCommunity:Moderate

Zozulya 2008 randomized 62 patients with GAD or neurasthenia to selank or medazepam (a benzodiazepine) and reported comparable anxiolytic efficacy with selank also showing antiasthenic and stimulant-like effects. Mechanism (Kost 2001) involves enkephalin-degrading enzyme inhibition, raising endogenous enkephalin tone — a different pathway than benzodiazepines.

2 human studies · 12 animal studies

Key findings & citations

Zozulya 2008: selank comparable to medazepam on Hamilton anxiety scale (n=62).
Selank produced antiasthenic and pro-stimulant effects medazepam did not.
Mechanism: enkephalinase inhibition, distinct from GABA-A modulation.
Russian research base — limited Western RCT replication.

Top citations

Our take

Genuine signal in Russian-language clinical work. Western RCT replication is the missing piece — until that exists, treat as 'promising but unproven by FDA-style standards.'

What Selank doesn't do

Claims that current evidence does not support. Worth knowing before you set expectations.

Replacement for SSRIs in major depression
Zozulya 2008 compared selank to a benzodiazepine in GAD, not to SSRIs in major depression. There is no head-to-head data positioning selank as an SSRI alternative.
FDA-approved use in the United States
Selank is approved in Russia only. There is no FDA approval and no Western Phase 3 program — practitioner use in the US is research-only or off-label.
Long-term cognitive enhancement in healthy adults
All published selank trials are in clinical anxiety populations. Healthy-user nootropic claims are extrapolation, not RCT-supported.

Technical specifications

Selank chemical & analytical data

Sold by Nura Peptide as: SELANK (Lyophilized) 10mg
Receptor targets: GABAergic / tuftsin analog
Backbone length: 7 amino acids
Modifications: Tuftsin analog with Pro-Gly-Pro C-terminal extension
Half-life (clinical PK): ~30–50 minutes (intranasal)
Form: Lyophilized (freeze-dried) powder in a sealed vial
Presentation: 10 mg
Purity on current lots (COA): 99.71%
Testing laboratory: Freedom Diagnostics Testing
Regulatory status: Research peptide; research-grade vials are not FDA-approved.

Selank Reconstitution Calculator

Dilution math and unit conversions. Prefilled using a common vial size for this peptide.

Open calculator

Storage & Handling

Storage at a glance

Proper storage temperatures, shelf life, reconstitution best practices, and travel tips for lyophilized and reconstituted peptides.

Powder: Freezer

1+ year at -20°C

Reconstituted: Fridge

4 weeks max at 2-8°C

View Complete Storage Guide

Handling specifics

Educational overview on storage, labeling, and traceability considerations for lab environments. Consult primary literature and vendor documentation for specifics.

Powder storage (very stable)

Freezer (-20°C): 1+ year
Refrigerator (2-8°C): 1-3 months
Room temperature: 2-3 weeks (emergency only)

Reconstituted storage (fragile)

MUST refrigerate at 2-8°C
4-week maximum shelf life
NEVER freeze after reconstitution
Use bacteriostatic water for multi-dose

11 answers

Selank FAQ: Buying, COA, Storage & Research

What are Selank's primary effects?

Selank is studied for anxiolytic (anti-anxiety) and nootropic (cognitive-enhancing) effects. Developed in Russia, it's a synthetic analog of tuftsin. It may help with mood regulation, memory, and immune modulation without the sedative effects of traditional anti-anxiety medications.

How does Selank work?

Selank modulates GABA, serotonin, dopamine, and norepinephrine systems. It influences the expression of brain-derived neurotrophic factor (BDNF) and affects enkephalin metabolism. Unlike benzodiazepines, it doesn't directly bind GABA receptors, so it provides anti-anxiety effects without sedation or dependence risk.

What is tuftsin and how does Selank relate to it?

Tuftsin is a naturally occurring tetrapeptide that stimulates immune function. Selank is tuftsin with an additional glyproline sequence attached (Thr-Lys-Pro-Arg-Pro-Gly-Pro). This modification gives Selank enhanced stability and adds the neurotropic/anxiolytic effects not present in tuftsin alone.

How is Selank administered?

Selank is most commonly administered as a nasal spray for brain-targeted effects. It can also be injected subcutaneously. Typical nasal dosages range from 200-600 mcg per day, often divided into 2-3 doses. Effects are usually felt within 15-30 minutes of intranasal administration.

Does Selank help with anxiety?

Yes, Selank has demonstrated anxiolytic effects in both animal and human studies. It's approved in Russia for anxiety and is comparable to benzodiazepines in effectiveness but without sedation, cognitive impairment, or addiction potential. Users report feeling calmer and more focused without the "drugged" feeling.

Can Selank improve cognitive function?

Research suggests Selank can enhance memory, learning, and mental clarity. It increases BDNF expression, which supports neuroplasticity. Users often report improved focus, better information retention, and clearer thinking. It's sometimes used by students and professionals for cognitive enhancement.

Does Selank have immune effects?

Yes, through its tuftsin component, Selank has immunomodulatory properties. It can enhance immune cell activity and has shown antiviral effects in some studies. This dual action (anxiolytic + immune) makes it unique among anti-anxiety compounds and potentially useful when stress is affecting immune function.

What are the side effects of Selank?

Selank is generally very well-tolerated. Possible side effects include mild nasal irritation (with spray), occasional headache, and fatigue in some users. It does not cause sedation, cognitive impairment, or withdrawal symptoms associated with traditional anxiolytics. Most users report no significant side effects.

How long does reconstituted peptide last?

Once mixed with bacteriostatic water, peptides remain stable for up to 4 weeks when refrigerated at 2-8°C (36-46°F). Unopened powder can last 1+ year in the freezer. Get our complete Storage & Travel Guide.

Is this peptide legal to purchase?

Peptides sold "for research purposes only" are legal to purchase in the US, but are not FDA-approved for human use outside of specific medical applications. Always consult a healthcare provider before use.

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Selank Studies & Sources

The following peer-reviewed studies and official resources provide additional scientific context for this peptide:

Selank Research Articles

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Selank

Selank Vial Sizes, Prices & Lots

Selank Certificate of Analysis