Early access to Black Friday 2026: sign up now.
Eurolabs Peptides
Peptides
Peptides · Section06
  • 01Weight managementMetabolic research
  • 02RecoveryTissue and recovery research
  • 03SkinSkin research
  • 04Ageing researchCellular processes
  • 05CognitionNeuroscience
  • 06Growth hormoneHormone research
All products
Science
Science · Section04
  • 01Amino acidsPrinciples and methods
  • 02Peptide bondPrinciples and methods
  • 03SynthesisPrinciples and methods
  • 04AnalysisPrinciples and methods
Study dossier
Applications
Applications · Section06
  • 01Cosmetic & SkincareSix research areas
  • 02Wound Care & RegenerationSix research areas
  • 03Wellness & Sports PerformanceSix research areas
  • 04Metabolic & Pharma-AdjacentSix research areas
  • 05CNS & NootropicsSix research areas
  • 06Longevity & SenolyticsSix research areas
Partners
Partners · Section04
  • 01Affiliate programProgramme and access
  • 02B2BProgramme and access
  • 03ApplyProgramme and access
  • 04Log inProgramme and access
Partners
Study journal
Study journal · Section01
  • 01Study journalPeer-reviewed study database
Study journal
Black Friday
Partners
Product enquiry

How can we help?

We can help with questions about products, strengths, available documents and existing orders.

How can we help?
How can we help?
Customer support
[email protected]
Direct inquiry

Write to us

Newsletter

Receive product and research news by email.

Privacy policy
Eurolabs Peptides

Founded from research, built for research.

Research peptides from Eurolabs Peptides.

For research purposes only. Not for human consumption.

Peptides

  • Peptides
  • Science
  • Applications
  • Study journal
  • Favorites

Knowledge

  • Research Use Only
  • Study dossier
  • Inquiry list
  • Partners
  • Partner portal

Help

  • Payment & Shipping
  • FAQs
  • Contact
Language

Language

Accepted payments
Visa
Mastercard
Stripe
PayPal
Apple Pay
Google Pay
American Express
SEPA
Revolut
Shipping partner
DHL Shipping

© 2026 Euro Lab GbR. All rights reserved.

Site map·Legal notice·Privacy Policy·Terms & Conditions
Log in
  1. Home
  2. Peptides
  3. Cognition
  4. Selank

EL-18· Research peptide

Selank

Batch analytics · >99 % purity

Cognition≥99% purityBatch analytics

Selank is a synthetic seven-amino-acid heptapeptide studied in neuropharmacological anxiety research. Its profile centers on GABA-related mechanisms and clinical comparison data.

Illustrative image; appearance and packaging may vary. 10 unlabelled vials, labelled only on the kit packaging. The selected strength applies.

Customer Reviews

No reviews yet. Be the first to share your experience.

Research Use Only (RUO)

HPLC analysisBatch-specific analytics
Independently verified quality
  • T.01
    Avg. 99.41% HPLC (2026)
    Every batch independently analyzed
  • T.02
    14-day money back
    On purity deviation
  • T.03
    GMP-compliant production
    ISO-certified lab partners
  • T.04
    Discreet ordering
    Neutral packaging
Quality assurance

Three independent verification layers

  • Synthesis QC labQ.01
    Q.01

    Tier I · Synthesis QC

    Tier I · Synthesis QC

    In-house · per step

    RP-HPLC, MS confirmation, sequence verification in cleanroom.

  • In-process analyticsQ.02
    Q.02

    Tier II · In-process

    Tier II · In-process

    Batch · final

    Identity, purity, and assay before release.

  • Third-party lab analyticsQ.03
    Q.03

    Tier III · Third-party lab

    Tier III · Third-party lab

    External · independent

    HPLC, ICP-MS, and microbiology by accredited lab.

953

satisfied

99.41%

Avg. purity 2026

4.8 ★

Store rating

EL-18 · Reference data

Heptapeptid · Tuftsin-Analog

Sequence
Thr-Lys-Pro-Arg-Pro-Gly-Pro
Molecular weight
751.89 Da
CAS
129954-34-3
Origin
Synthese · München (DE)
Application fields
A.05
OverviewQualityFAQs

About Selank (Selank)

Buy Selank: A Heptapeptide for Anxiety Research

Selank is a synthetic peptide made up of seven amino acids that is studied in neuropharmacological research. Its sequence Thr-Lys-Pro-Arg-Pro-Gly-Pro is precisely defined, making the compound interesting for studies of nerve cells and neurotransmitter systems. Particularly compelling is where molecular GABA research meets clinical observations in anxiety states.

Anxiety-related systems are a complex research field in which neurotransmitters, receptors and stress axes interact. With its short, defined structure, Selank offers a manageable starting point for examining individual levels of these systems in a targeted way.

The sequence can be broken down into its seven building blocks: threonine, lysine, proline, arginine, proline, glycine and proline. For research, this defined order matters because it creates a reproducible basis for experiments and makes the compound distinguishable from other peptides.

Understanding GABAergic Signal Processing

GABA is the main inhibitory neurotransmitter in the central nervous system. It tempers the excitability of nerve cells and helps keep signals organized in time and space. GABAergic systems include receptors, transporters and enzymes, and their interaction determines how strong an inhibitory effect is within a given network.

Gene Expression in the Rat Brain

In a study in rats, Selank altered the expression of several genes involved in GABAergic neurotransmission. Part of the pattern resembled the changes seen after GABA administration (study of GABA-related gene expression). The measurements came from the frontal cortex and provide insight into how the peptide might influence signal processing at the molecular level.

Genes are the blueprints for receptors, transporters and enzymes. When their expression changes, a system's capacity changes, not just its current activity. That is precisely why transcriptional data provide an interesting entry point for asking how a peptide might shape GABAergic networks over the longer term.

Context still matters: findings from the rat brain do not demonstrate direct binding to benzodiazepine receptors or an increase in cognitive performance in humans. They provide a well-grounded mechanistic hypothesis that is being tested in additional models.

Clinical Comparison Study in Generalized Anxiety Disorder and Neurasthenia

The key clinical study included 62 patients: 30 received Selank and 32 received the comparator drug Medazepam. In generalized anxiety disorder and neurasthenia, similar anxiolytic effects were reported on clinical rating scales for both groups (randomized comparison study with 62 patients).

The study was randomized and actively controlled. Placebo control and blinding are not described in the abstract, so similar scale scores are not formal evidence of non-inferiority or general equivalence. The results apply to adults with these two diagnoses in clinical care, not to other forms of anxiety or healthy individuals.

Enkephalin as an Exploratory Component

The same study measured enkephalin activity in serum and related it to anxiety and asthenia scores (the study's enkephalin measurements). Enkephalins are endogenous opioid peptides involved in regulating pain perception and emotional processing. Serum activity is an indirect measure and does not mirror one-to-one what happens in the brain. The observed associations are therefore an exploratory indication of possible systems involved, not proof of the mechanism of action.

Preclinical gene expression, clinical scale scores and enkephalin measurements describe different levels of the same research field. No level replaces another. Together they form a profile that makes Selank an interesting subject of study for anxiety-related neuropharmacology and provides starting points for further studies.

Choosing Selank for Research

Selank is available as Selank 10 mg and Selank 5 mg; the figure refers to the amount per vial. For neuropharmacological studies, this gives you two clearly defined variants to choose from. Buy Selank now and view the matching variant in the shop.

Quality, purity & batch documentation

Every batch is analyzed by an independent laboratory via HPLC before shipment. We document purity (avg. 99.41% in 2026), mass spectrometry identity, and sterility. Production follows GMP standards in ISO-certified laboratories.

Frequently asked questions

Selank is a synthetic heptapeptide with the sequence Thr-Lys-Pro-Arg-Pro-Gly-Pro. It is studied in neuropharmacological research in relation to anxiety states and GABAergic signaling pathways.

In rats, Selank altered the expression of several GABA-related genes, in part similarly to changes after GABA administration. The finding supports a mechanistic hypothesis; however, the study is not a receptor-binding study.

The randomized study included 62 adults: 30 received Selank and 32 received Medazepam. In generalized anxiety disorder and neurasthenia, similar scores were reported on clinical scales.

Enkephalins are endogenous opioid peptides involved in the processing of pain and emotion. The study related their serum activity to anxiety and asthenia scores, yielding an exploratory indication, not proof of a mechanism.

Ready to ship
Strength per vial · Kit prices

1 Kit contains 10 vials

Total€139.001 Kit · 10 vials€13.90 / vial
1
Visa
Mastercard
Stripe
PayPal
Apple Pay
Google Pay
American Express
SEPA
Revolut

You May Also Like

Semax

Semax

Cognition≥99% purityBatch analytics
€119.00
DSIP

DSIP

Sleep research≥99% purityBatch analytics
€139.00
KPV

KPV

Immunology≥99% purityBatch analytics
€149.00
MOTS-c

MOTS-c

Ageing researchMitochondrial research≥99% purityBatch analyticsHPLC-verifiziert
€249.00
SS-31

SS-31

Ageing researchMitochondrial research≥99% purityBatch analytics
€409.00
Pinealon 10 mg

Pinealon 10 mg

Cognition≥99% purityBatch analytics
€209.00
5-Amino-1MQ

5-Amino-1MQ

Weight management≥99% purityBatch analytics
€79.00
AHK-Cu

AHK-Cu

Skin≥99% purityBatch analytics
€109.00