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5 mg vial lyophilised vial of Selank, ISO/IEC 17025 lab-verified, Peptyds packaging
Research Peptides
Research
Selank
Nootropic & Anxiolytic Research
ISO/IEC 17025 TestedPurity ≥ 98%
Nootropic & Anxiolytic Research.
Research Peptides

Selank

Selank is a synthetic heptapeptide analogue of the naturally occurring peptide tuftsin (Thr-Lys-Pro-Arg), elongated with the Pro-Gly-Pro sequence to improve metabolic stability. It is studied for its role in enkephalinase inhibition, GABAergic modulation, and BDNF up-regulation.

Nootropic & Anxiolytic Research.

ISO/IEC 17025 TestedPurity ≥ 98%

For Research Use Only — Not for Human Consumption.

Sold strictly for in vitro laboratory research purposes.

€35€425 mg · Incl. VAT · €7.00 / mg
Out of stock

Single email when this batch is back. No marketing list, no follow-ups.

Availability
Delivered in 3–7 days (EU)
Storage
Store 2–8 °C. Reconstitute before use.
Ships from
EU Fulfilment Centre

Lab proof, by batch

  • Tested independently, by batch
  • Certificate of analysis available
  • Purity and identity on record
What this peptide is for

Nootropic & Anxiolytic Research.

Selank (CAS 129954-34-3) is a synthetic heptapeptide tuftsin-analogue designed to resist rapid enzymatic degradation. Research has examined its role in modulating dopamine and serotonin pathways, inhibiting enkephalin-degrading enzymes, and supporting cognitive resilience under stress. Formula C33H57N11O9, MW 751.9 g/mol.

Linked research
  • Seredenin et al. (1998) — Anxiolytic properties of tuftsin analogue Selank in animal models.
  • Semenova et al. (2010) — Modulation of BDNF and NGF expression in the hippocampus following Selank administration.
  • Kost et al. (2001) — Selank as an inhibitor of enkephalin degradation in human serum.
  • Uchakina et al. (2008) — Immunomodulatory effects of Selank in patients with anxiety-asthenic disorders.

Research context only. Not medical advice. Consult a qualified clinician before use.

Specification
  • 5 mg lyophilised powder per vial
  • Reconstitute with bacteriostatic water before use
  • Store lyophilised at 2–8 °C, keep from light
  • Once reconstituted, refrigerate and use within 30 days
What arrives in the box
  • One 5 mg lyophilised Selank vial
  • Tamper-evident cap and batch-coded label
  • Storage card with reconstitution guidance
Pharmacology

What the research reports about this molecule.

Classic parameters from peer-reviewed literature. Not human dosing guidance — read alongside the PubMed references on /learn.

Sequence
Thr-Lys-Pro-Arg-Pro-Gly-Pro
Molecular weight
751.9 Da
Mechanism
Enkephalinase inhibition, GABAergic modulation, BDNF up-regulation
Research domain
Anxiolytic and nootropic pathways
Reconstitution
Bacteriostatic water, USP
Storage
Long-term -20°C lyophilised; reconstituted 2-8°C
How to use

Simple, deliberate steps — not a protocol.

These are practical handling notes. Dosing decisions stay between you and your clinician.

  1. 1

    Reconstitute with bacteriostatic water — swirl, do not shake

  2. 2

    Draw the dose your clinician agreed with you using a fine-gauge syringe

  3. 3

    Store the reconstituted vial in the fridge, use within 30 days

How-to-use guide

Read the research protocol

Concise reconstitution, dosing, and handling instructions.

Reconstitution calculator

Research use only

Syringe

Peptide in vial

Bacteriostatic water

Concentration2.5 mg/mL

Target dose

Pull syringe to

10

units · 0.1 mL

010203040506070809010010

Concentration

2.5

mg/mL

Doses per vial

20

doses

U-50 5 · U-40 4 units

For laboratory research calculation only. Not medical or dosing advice, and not for human or veterinary use.

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Quality documentation
Batch-by-batch lab verification

Each release is matched with quality documentation through a documented verification path. Identity, purity, and composition test results sit on the product page before you buy.

Quality documentation
ISO/IEC 17025-accredited lab testing

Every batch is verified by an ISO/IEC 17025-accredited laboratory before release. Identity, purity, and documentation travel with the product — not behind a form.

Storage & shipping
Kept-cold commitment

Sensitive peptides ship in insulated cold packaging with gel packs sized for a 48-hour transit window, tracked door to door.

Questions, answered plainly

Everything worth asking before you order.

Shipping, storage, quality, and when to speak to a clinician — without the runaround.

What proof of quality comes with my order?

Every batch ships with a batch code printed on the vial. The matching independent lab report — showing identity, purity, and composition — is linked on the product page and stays on your order page after purchase.

How should I store my order when it arrives?

Sensitive peptides ship cold. Move them to a fridge on arrival (2–8 °C) unless the product page states otherwise. Lyophilised vials can tolerate short transit at ambient temperature but should not be left unrefrigerated for extended periods once delivered.

When will my order ship and arrive?

Orders placed before 14:00 CET Monday–Friday ship the same business day from our European fulfilment centre in The Hague, Netherlands. Standard tracked EU delivery arrives in 2–4 business days; express options are available at checkout.

What happens after I place an order?

You will receive an order confirmation, then a dispatch email with tracking once the package leaves our fulfilment centre. Your order page keeps the batch code, lab report, and storage guidance in one place for later reference.

How do I reconstitute a lyophilised peptide vial?

Bring both the lyophilised vial and the bacteriostatic water to room temperature, equalise pressure with a sterile vented needle, then inject the solvent slowly down the side of the vial. Swirl gently — never shake — until clear, and refrigerate at 2–8 °C.

How much bacteriostatic water should I add to my peptide vial?

The calculation is peptide mass (mg) ÷ desired concentration (mg/mL) = volume of bacteriostatic water in mL. For example, a 5 mg vial at 1 mg/mL needs 5 mL; at 2 mg/mL, 2.5 mL. Every Peptyds product page carries a suggested reconstitution volume tuned to the vial size.

How long does a reconstituted peptide stay stable in the fridge?

Most lyophilised peptides reconstituted with bacteriostatic water remain stable for 28–30 days at 2–8 °C, protected from light. A handful of short, fragile sequences — Epithalon among them — drop to roughly 14 days. Never freeze a reconstituted vial.

What side effects are most commonly reported across peptide research?

Across published trials and case series, the most frequent reported events are injection-site reactions (redness, induration, transient discomfort), headache, mild nausea, and temporary fatigue. GLP-1 and dual-agonist class peptides add dose-dependent gastrointestinal effects.

Who should not use peptides?

Peptides are not appropriate for anyone who is pregnant, nursing, planning conception, under 18, managing active cancer, or on immunosuppressants — and competitive athletes governed by WADA must avoid every peptide on the prohibited list. Anyone with a personal or family history of melanoma should specifically avoid melanocortin-receptor agonists.

Should I speak to a clinician before using a peptide?

We recommend it — especially if you are pregnant, nursing, managing a medical condition, or combining peptides with prescribed medication. Our product pages are educational. They are not medical advice and they do not replace a conversation with a qualified practitioner.

Buy Selank 5 mg — Research Peptide | EU Delivery | Peptyds