Selank

Selank is a synthetic seven-amino-acid peptide based on the naturally occurring immune peptide tuftsin, studied mainly in Russia for anxiety and as a nootropic. It is a research chemical, not an FDA-approved medicine, and is not a proven human therapy outside the specific contexts where it is registered. Everything here is for education only and is not medical advice or a recommendation to obtain or use it.

What is Selank?#

Selank is a heptapeptide (sequence Thr-Lys-Pro-Arg-Pro-Gly-Pro) created by Russian researchers as a more stable analog of tuftsin, a small immune-signaling peptide. Plain tuftsin is broken down within seconds in the blood; adding a Pro-Gly-Pro "tail" to Selank slows that breakdown and extends its activity, although the molecule still lasts only minutes in plasma. It also carries the research label TP-7, and a modified, longer-acting version is sold as N-acetyl Selank amidate.

In Russia and some neighboring countries Selank is a registered prescription medicine, often given as a nasal spray. Outside those markets it is generally supplied as a lyophilized (freeze-dried) white powder labeled "for research use only," which must be reconstituted with a sterile diluent before it can be measured in liquid form.

How does Selank work?#

The proposed mechanisms come mostly from animal and laboratory studies plus small human trials, so they should be read as working hypotheses rather than settled facts. Reported observations include:

• Slowing enkephalin breakdown. Selank inhibits enkephalin-degrading enzymes in human serum, which can raise levels of these natural anti-stress peptides. Researchers have proposed this as one route to its anxiolytic effect.
• Indirect effects on the GABA system. Some studies describe Selank as modulating GABAergic signaling, distinct from the way benzodiazepines bind the GABA-A receptor directly. Laboratory work has also examined how Selank, alone or combined with GABA, can affect genes involved in GABA neurotransmission.
• Effects on monoamines and BDNF. Preclinical work reports influences on serotonin and dopamine metabolism and, in some animal studies, increased brain-derived neurotrophic factor (BDNF), which is offered as a possible basis for nootropic and neuroprotective effects.
• Immune and stress signaling. Because it derives from tuftsin, Selank has been studied for effects on cytokines and immune markers under stress conditions.

None of these mechanisms has been confirmed in large, modern, independently replicated human trials. A licensed clinician is the right person to interpret what, if anything, this means for an individual.

What is Selank studied for?#

The Selank literature combines small Russian human trials with a larger body of animal and laboratory work. The table below summarizes common research themes and their evidence level in humans.

The recurring caveat applies throughout: animal results do not reliably predict human outcomes, most human data are small and concentrated in one country, and Selank has not been validated as a treatment for any condition by regulators such as the FDA or EMA.

Is Selank legal and FDA-approved?#

Selank is not FDA-approved and is not a recognized dietary supplement in the United States, so it cannot lawfully be marketed for human consumption there. It is, however, an approved prescription medicine in Russia and certain Commonwealth of Independent States countries, where it has been used for anxiety and stress-related disorders. That foreign approval does not make it legal as a medicine or supplement in the U.S., the EU, or the UK, where it is generally sold only as a research chemical. Selank is not, as of mid-2026, named on the World Anti-Doping Agency Prohibited List, but WADA's category for substances with no current approval by a major regulatory authority can be interpreted broadly, so athletes subject to testing should verify the current rules and consult a licensed professional before assuming it is permitted.

How is Selank dosed in research?#

There is no validated human dose recognized outside Selank's specific Russian approval, and there is no established Western dosing standard. WikiPeps does not publish dosing protocols. The amounts used in Russian studies and product labeling do not translate into safe, general human guidance, and any decision about quantity, route, or frequency is a medical decision that belongs with a licensed clinician who knows your history.

How is Selank reconstituted?#

Lyophilized Selank is reconstituted by slowly adding bacteriostatic water to the vial and gently swirling until the powder fully dissolves. The numbered steps in the "How To" section above outline the general, education-only process, and the reconstitution guide and mixing-math guide explain how to choose a diluent volume and convert it to syringe units. Note that intranasal and injectable preparations differ, and product labeling should always be read carefully.

What are the safety considerations?#

Human safety data are limited because large, modern, independently run clinical trials have not been completed outside Russia. The Russian studies generally described Selank as well tolerated, with relatively few reported effects and no strong sedation or dependence signal, but these were small studies and tell us little about long-term safety in broader populations. That uncertainty is itself a safety concern: unknown long-term effects, variable product purity in the research-chemical market, and the absence of FDA oversight all raise risk. Sterility during handling matters, and contamination can cause infection. Because of these unknowns, the only responsible step before considering any peptide is a conversation with a licensed clinician.

The bottom line#

Selank is a synthetic, tuftsin-derived peptide with a real but geographically narrow body of evidence centered on anxiety and cognition, and it is an approved medicine in Russia. In the United States and most of the world it is not FDA-approved, not proven by modern regulatory standards, and not a validated treatment. Treat everything here as education, verify the law where you live, and talk to a licensed clinician before making any health decision.