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Neuropeptides · HEPTAPEPTIDE
Selank 10 mg
Lyophilized vial · 7 AA
Per vial
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SingleShips within 48 hours from San Antonio
UPS Ground · tracked + insured · released after independent lab testing
- Purity Guarantee. If a batch fails our ≥99% HPLC standard, full refund + replacement.
- Batch certificate in the COA library, anytime, free
- Same reorder price — forever, no upcharge
$55.99
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Selank in brief
Selank is a synthetic heptapeptide analog of tuftsin, an immune-active tetrapeptide, developed in Russia and studied mainly in rodent research on anxiety-related behavior, gene expression and immune signaling. Not approved by the FDA for any use. Supplied for research use only.
— About this compound
Selank.
Class · Synthetic heptapeptide (Thr-Lys-Pro-Arg-Pro-Gly-Pro) — tuftsin analog
Origin. Developed in Russia at the Institute of Molecular Genetics of the Russian Academy of Sciences. Designed as a stabilized analog of the immunomodulatory peptide tuftsin (Thr-Lys-Pro-Arg).
Selank is a synthetic heptapeptide consisting of the human tuftsin tetrapeptide (Thr-Lys-Pro-Arg) extended with the C-terminal tripeptide -Pro-Gly-Pro. The C-terminal extension confers significant proteolytic resistance, supporting longer in-vivo activity than the parent tuftsin.
Selank is one of two Russian-developed heptapeptides commonly co-studied in the neuropeptide literature; the other (Semax) is structurally distinct but is often cited alongside Selank in research on neurotrophic and behavioral endpoints.
— Common research applications
- Anxiolytic-pathway research
- BDNF / NGF expression studies
- Neuropeptide receptor research
- Comparative tuftsin-analog studies
— Mechanism
How it's been studied.
Reported effects on GABAergic and serotonergic neurotransmission in preclinical research. Modulates BDNF and NGF expression in some rodent models. CNS effects reported in rodent models.
Mechanism descriptions reflect findings reported in the preclinical and basic-research literature. They are not clinical conclusions and not statements of therapeutic effect.
— The Chemistry
The numbers, plainly.
CAS
129954-34-3
Molecular weight
751.9 Da
Formula
—
Sequence
TKPRPGP
Format
Lyophilized powder
Vial dose
10 mg
Purity (HPLC)
≥99%
Amino acids
7
Half-life
Short circulating half-life; CNS effects reported well beyond serum-detectable window in research models.
Solubility
Water-soluble. Physicochemical context only. Merit Sciences publishes no reconstitution or preparation procedures.
View the July 2026 batch certificate for Selank 10 mg → or browse every certificate.
— Why Merit
The supplier difference.
How Merit compares to the two alternatives most research buyers consider for Selank.
Comparison reflects published facility status and standard industry practice. Compounding pharmacy availability of research peptides varies by jurisdiction.
— How it's made
From compound to your shelf.
Every Merit batch follows the same documented path. Five steps, every one verifiable.
- 01
Sourcing
Compound starts as a research-grade API.
Active pharmaceutical ingredient sourced from FDA-registered manufacturers. Identity confirmed against reference standard before any compounding begins.
- API from FDA-registered manufacturers
- Identity verified against reference standard
- Chain of custody documented
- 02
Compounding
Sterile-filled in a US cleanroom.
Lyophilized in a cleanroom at our US facility. The powder format gives ≥24 months sealed stability — no cold-chain shipping required.
- Licensed US facility
- Batch-documented manufacturing process
- Lyophilized powder for transit stability
- 03
Verification
Every batch HPLC-tested.
Reverse-phase HPLC-UV (UV/MS for higher-MW peptides) confirms identity and purity for every batch before it leaves the lab. The chromatogram is archived.
- Reverse-phase HPLC, per-batch
- ≥99% purity floor — every batch
- Chromatogram archived for every batch
- 04
Release
The batch is released against an independent assay.
No batch ships until an independent laboratory has returned its identity and purity results and the certificate is published in the COA library.
- Independent laboratory on every batch
- Certificate published before sale
- Every certificate is in the public COA library
- 05
Dispatch
Ships from San Antonio in 48 hours.
Sealed vials with a QR code on the label that opens the COA library. Order before 2pm CT Monday–Thursday for same-day dispatch. UPS Ground, tracked + insured.
- 48hr dispatch from San Antonio, TX
- QR code on every vial label
- UPS Ground, tracked + insured
Every step above can be verified for any specific batch by emailing support@meritsciences.com with your order number.
— Research references
The published record.
Peer-reviewed work cited in the public scientific literature. Links resolve to PubMed or the publisher of record.
- 01
The temporary dynamics of inflammation-related genes expression under tuftsin analog Selank action
Kolomin T, Shadrina M, Slominsky P, et al. · Molecular Immunology · 2013
- 02
Selank Administration Affects the Expression of Some Genes Involved in GABAergic Neurotransmission
Volkova A, Shadrina M, Kolomin T, et al. · Frontiers in Pharmacology · 2016
Inclusion of a reference does not constitute a clinical claim or recommendation.
— Pairs Well With
Researchers stack this with.
The Neuropeptide Pair
Russian heptapeptides
Selank and Semax: the two most-studied compounds in neuropeptide research, almost always stacked together.
$167.01 · save 10%
— Go deeper
Mechanism, published research and peer-reviewed references for Selank, with no product attached.
Research review on The Assay, Merit’s editorial publication: Semax vs Selank: What the Published Research Compares
— Common Questions
Got questions.
Is Selank FDA-approved?+
Not approved by the FDA for any use. Supplied for research use only.
How is each batch of Selank tested?+
Every batch is tested by an independent laboratory for identity and HPLC purity before it is listed. Merit identifies batches by date: the current certificate for Selank 10 mg is the July 2026 batch, 99.42% purity by HPLC, published at meritsciences.com/coa/COA-2026-CHK0V9. The QR code on each vial opens the same page. Open the July 2026 batch certificate →
What does the published research on Selank show?+
Russian research groups have studied it mainly in rodents, reporting changes in the expression of inflammation-related genes (Kolomin, Molecular Immunology 2013) and GABAergic genes (Volkova, Frontiers in Pharmacology 2016). The Selank monograph at meritsciences.com/library/selank lists the references, and The Assay, Merit's editorial publication, reviews the evidence at theassay.co/articles/semax-vs-selank. Read the Selank monograph →
What is Selank?+
Selank is a synthetic heptapeptide consisting of the human tuftsin tetrapeptide (Thr-Lys-Pro-Arg) extended with the C-terminal tripeptide -Pro-Gly-Pro. The C-terminal extension confers significant proteolytic resistance, supporting longer in-vivo activity than the parent tuftsin.
How does Selank work?+
Reported effects on GABAergic and serotonergic neurotransmission in preclinical research. Modulates BDNF and NGF expression in some rodent models. CNS effects reported in rodent models.
What class of compound is Selank?+
Selank is classified as synthetic heptapeptide (Thr-Lys-Pro-Arg-Pro-Gly-Pro) — tuftsin analog.
What is the reported half-life of Selank?+
Short circulating half-life; CNS effects reported well beyond serum-detectable window in research models.
Why does Merit ship lyophilized?+
Lyophilized (freeze-dried) material is stable in sealed storage: ≥24 months at -20°C. Peptides held in solution degrade far faster, so every compound ships as a dry powder in a sealed vial.
What does "independently assayed" actually mean?+
Every batch is tested by a laboratory independent of the facility that made it, and the certificate is published before the batch is listed. You read the same identity and purity figures we do, which is what separates Merit from a reseller catalog.
How fast does it ship?+
48 hours from order to dispatch, Monday through Thursday. UPS Ground, tracked + insured. From San Antonio, TX, most US addresses receive within 3-5 business days.
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