Synthetic heptapeptide · Tuftsin analog
≥99% HPLC per independent batch · the measured value of each batch is on its COA
Refrigerated at 2–8°C in our warehouse · lyophilized and stable during shipping
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| Molecular class | Tuftsin analog heptapeptide |
| Sequence | Thr-Lys-Pro-Arg-Pro-Gly-Pro |
| Formula | C33H57N11O9 |
| Molecular weight | 751.88 g/mol |
| CAS | 129954-34-3 |
| Purity | 99% HPLC (guaranteed minimum; the measured value of each batch is on its COA) |
| Storage | -20°C lyophilized · 2-8°C reconstituted |
Selank is a synthetic heptapeptide (Thr-Lys-Pro-Arg-Pro-Gly-Pro) derived from the immunomodulatory tetrapeptide tuftsin, developed in Russia for neuroscience research. It has been studied for its possible effects on anxiety, neurotransmitter modulation and neuroimmune regulation, with no known hormonal activity.
See the full technical sheet: mechanism, evidence and regulatory status ↓
The following research areas have been studied in preclinical models (in vitro and in vivo in animals). This information is for scientific reference only.
Chemical identity, studied mechanism, quality of the available evidence and regulatory status. Reference material; you do not need to read it to buy.
Resulting concentration depending on the bacteriostatic water you add, and its equivalent in units on a U-100 insulin syringe (100 IU = 1 mL). For this vial, 1 mL is recommended.
| BAC water | Concentration | 250 mcg | 500 mcg | 1000 mcg |
|---|---|---|---|---|
| 1 mL recommended | 10,000 mcg/mL | 2.5 IU (0.03 mL) | 5 IU (0.05 mL) | 10 IU (0.1 mL) |
| 2 mL | 5,000 mcg/mL | 5 IU (0.05 mL) | 10 IU (0.1 mL) | 20 IU (0.2 mL) |
| 3 mL | 3,333.33 mcg/mL | 7.5 IU (0.08 mL) | 15 IU (0.15 mL) | 30 IU (0.3 mL) |
| 5 mL | 2,000 mcg/mL | 12.5 IU (0.13 mL) | 25 IU (0.25 mL) | 50 IU (0.5 mL) |
The reference masses are volumetric calculation values for laboratory work, not an administration schedule. Material for scientific research use only.
Need a different amount? Use the reconstitution calculator or see the full table by vial.
Current status: No regulatory approval in North America or the European Union.
In Mexico, a research peptide is sold as a laboratory reagent (RUO, research use only). It is not a medicine: it has no COFEPRIS sanitary registration for human or veterinary use, it is not dispensed in pharmacies and it does not require a prescription, precisely because it is not sold to be administered to people. RUO labeling is not a commercial technicality; it is the product's regulatory category and defines what can and cannot legally be done with it. Since it is a domestic shipment, the order does not go through customs and is not subject to import procedures.
Like Semax, it comes from Russian pharmaceutical development and holds a national registration in that country, with no regulatory effect in Mexico.
Regulatory framework reviewed in August 2026. See the full regulatory timeline, with the dates of each FDA decision between 2023 and 2026.
Compounds in the same category, with what sets each one apart and its entry price. Mechanism and cost are compared, not efficacy: there are no human trials that allow them to be ranked by outcome.
| Compound | What sets it apart | From |
|---|---|---|
| Selank este producto | Synthetic heptapeptide · Tuftsin analog | $1,300 ($130/mg) |
| Semax | ACTH(4-7) analog · Neuroprotective nootropic | $1,400 ($140/mg) |
| DSIP | Delta Sleep-Inducing Peptide · Neuromodulatory nonapeptide | $1,500 ($150/mg) |
| Cerebrolysin (agotado) | Neuroprotective peptide blend · Porcine extract | $1,300 ($22/mg) |
Comparativa detallada: Semax vs Selank →
An anxiolytic and nootropic peptide clinically registered in Russia, a tuftsin analog. It is studied for its effect on anxiety, mood and mental clarity without sedation.
In terms of chemical identity, it is classified as Tuftsin analog heptapeptide, its CAS number is 129954-34-3, its molecular weight is 751.88 g/mol. These identifiers are what allow the material received to be checked against the batch Certificate of Analysis.
Also known as: Tuftsin analog · anxiolytic/nootropic.
A tuftsin-analog heptapeptide; it modulates GABA, serotonin, BDNF and enkephalins, with anxiolytic and immunomodulatory effects.
The description above summarizes the mechanism proposed in the available literature. As with most research peptides, these are pathways studied in cell and animal models; their equivalent function in humans under physiological conditions has not been established.
Route used in the studies: Subcutaneous (SC) or intranasal. It is given for documentation purposes, to interpret the literature; it is not an instruction for use.
The available literature on Selank comes from preclinical research: cell culture studies and animal models. There are no controlled clinical trials establishing efficacy or safety in humans, which is why the compound has no approval from any regulatory agency for human use.
It is worth being explicit about what that means: a preclinical finding describes what happens in a specific experimental system, with a given species, route and exposure range. Extrapolating it to a person adds variables — pharmacokinetics, immunogenicity, interactions, repeated exposure — that those studies did not measure. The absence of data is not evidence of safety or of risk: it is an absence of data.
Reference: Russian clinical studies (Selank is registered in Russia).
The following lines appear in the preclinical literature. They are listed for scientific reference only: they are not indications, efficacy claims or suggestions for use.
The vial is delivered lyophilized, that is, as a dry powder obtained by freeze-drying. In that form it is stable and does not require a cold chain during transport: shipping does not compromise the material. On receipt, it is kept refrigerated between 2 and 8 °C, protected from light.
For the Selank strengths, a reference reconstitution would be: el vial de 10 mg with 1 mL of bacteriostatic water queda a 10 mg/mL. The volume is not fixed — more water gives a more dilute solution with a larger measuring margin; less water concentrates it — and the choice depends on the working protocol.
The diluent is added slowly along the wall of the vial, never directly onto the powder, and left to rest for five to ten minutes. The vial is swirled gently until fully dissolved; shaking it hard subjects the peptide to mechanical stress that can denature it. Once reconstituted, it is kept refrigerated and is not frozen.
Bacteriostatic water contains 0.9% benzyl alcohol as a preservative, which allows multiple draws from the same vial. Plain sterile water has no preservative and is only suitable for immediate use. Signs of degradation to watch for: cloudy solution, visible particles, change in color or odor.
No. It is sold exclusively as a research-use-only (RUO) reagent, labeled as not fit for human consumption. It has no COFEPRIS sanitary registration and no approval from any other agency for human or veterinary use.
Every batch comes with a Certificate of Analysis issued by an independent laboratory, with the HPLC chromatogram, the purity percentage, the batch number and the date of analysis. It is included in the price and you can download it from the product page and from your account.
Shipping is express, 1 to 3 business days depending on the area, with a tracking number, to all 32 states. Since it is a domestic shipment sent from within Mexico, it does not go through customs: there are no holds or import procedures.
Lessons from the free certification that explain Selank and its scientific context:
This compound has no reviews of its own yet. Below you can see what customers say about other products in the catalog: each card shows which one it refers to.
Super bien muy recomedado este laboratorio y llegan en 2 dias 🙏🏻 gracias seguire comprando con ellos
Es mi segunda vez que pido y estoy más que convencido de la excelente calidad y servicio de su equipo... ampliamente recomendables
Empaque excelente, Recibir tu pedido con agua Bac3ml es lo mejor. Entrega en 3 días max.
Me sorprendió la atención y la presentación, llegó a tiempo y muy bien empacado y con su BAC water, absolutamente recomendables y también tiene su guía de preparación y uso que te llega con dos QR en tu paquete
Excelente servicio, muy amables, siempre he recibido mis productos en tiempo y forma, llegan muy bien protegidos y el producto me ha funcionado de maravilla
el servicio desde el primer contacto excelente el envio rapido y todo a la perfecccion los peptidos una maravilla
Excelente servicio, muy amables, muy el paquete llegó en tiempo y forma, muy bien empaquetado y producto de calidad.
Es la 3a vez que compro y todo va bien ! Los empaques de lujo y el seguimiento igual ! Éxitos
Excelente servicio, muy seguro, el péptico llegó perfectamente empacado, llego en el tiempo indicado
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