Selank is a peptide seven amino acids long. It is a small immune fragment called tuftsin, with a tail added to slow its breakdown.
What matters first
Why people look it up
Sellers market it for anxiety, stress and calm focus.
What the evidence shows
Russian groups gave it to patients with anxiety disorders and compared it with two older sedatives. Those studies never said how much anyone received. No source gives a human dose. English reviews describe it as well tolerated, but they trace that claim to an experiment in rats.
Dose status
No completed controlled human trial has shown which dose works for Selank. A few people may have received it in small reports, but that cannot show which dose works. The sections below separate study findings from what people report using.
Selank at a glance: foreign approval or limited human data, dosing basis, regulatory status, safety coverage, and cited-source count. These details summarize the available sources; they are not treatment recommendations.
Evidence snapshot
Foreign approval or limited human data
The fastest way to see what kind of evidence this page is built on.
Selank at a glance: foreign approval or limited human data, dosing basis, regulatory status, safety coverage, and cited-source count. These details summarize the available sources; they are not treatment recommendations.
Medically reviewed by Jennifer Montecillo, MD · non-practicing medical reviewer·Reviewed 2026-08-13·open the primary sources
What is known about Selank
Selank is a seven-amino-acid peptide: the four-residue immune fragment tuftsin with a three-residue tail added so the body breaks it down more slowly. Russian groups have given it to patients with anxiety disorders since the 2000s and compared it against two older sedatives. Those studies were published, and not one of them says how much anyone received. No quantity given to a person has ever been printed.
Selank research and regulatory details: evidence quality, approval status, doses, handling, and presentation.
Topic
Value
Strongest source
limited human data
FDA approval
Not FDA-approved
Typical vials
10 mg
Every row links back to a source listed below. These facts are for reference, not a personal recommendation.
What the evidence for Selank is
People have received this compound in a documented setting, or it has approval outside the United States. The available human evidence is still too limited to show a clear dose-and-result pattern for US use.
limited human data
What it establishes
It shows that people have received it and that some human information exists.
What it does not establish
It does not prove that the same dose is appropriate in the United States or that uncommon and long-term risks are known.
Check the country, study size and reason it was used. Do not treat limited human data as an FDA-approved schedule.
Where Selank is in clinical trials
No trial of this compound is registered on ClinicalTrials.gov.
That is worth sitting with. Nobody has registered a study to find out whether Selank works in people, so no result is coming and no date is worth waiting for. Sellers are not waiting for that work either.
A registered study means a sponsor filed a plan and started enrolling. It is not evidence the drug works, and most drugs tested in people never reach a pharmacy. Sponsors write and update these sources themselves; the National Library of Medicine publishes them without checking them.
Selank is reported to be registered in Russia as an anxiety treatment, and that could not be confirmed at the register itself.
Every English source stating it traces back to a study in mice. FDA has approved nothing under this name and holds no label for it. No Selank study appears on any trial registry.
English reviews that describe a human side-effect profile for it cite a rat experiment. Material sold under this name has been recovered in seized preparations, and no regulator anywhere has examined what is in a vial.
No published source states any quantity of this peptide given to any person, in any unit. The studies below were run and published without printing a dose
Human studies do exist. Sixty-two patients with generalized anxiety disorder and neurasthenia were tested against an older sedative. Sixty more with anxiety and somatoform disorders were tested against another. Seventy took part in a combined-treatment design, and 52 healthy volunteers in a brain-imaging study
The only human duration figure found anywhere is 14 days, in a study that measured immune signals rather than anxiety
The route in people is unresolved. The one English-language human study says the peptide was injected, not given into the nose, and its full text is not open
There is no human side-effect data. A side-effect profile does circulate in English reviews. It describes the peptide as safe, non-sedative and non-addictive, with mild drowsiness or dry mouth. Those reviews cite it to a study in rats
One frequently quoted list of side effects belongs to the sedative it was tested alongside, not to this peptide. The study found the peptide reduced that drug’s effects
Two 2026 peer-reviewed reviews make claims their own cited sources do not support. Those claims cover its regulatory status and its effect on serotonin, dopamine and brain growth factor
It has never been registered on a trial registry anywhere
The quantities that do exist are from animals: 200 to 3000 micrograms per kilogram in mice, and 0.3 milligrams per kilogram in rats. Neither converts to a human dose
It has been recovered in seized pharmaceutical preparations alongside Semax, and is sold online as powder for injection and as nasal sprays
Questions about Selank
Is Selank FDA-approved?
No. There is no prescribing label for it, so no approved dose exists — the regulatory status section above has the detail.
How is Selank taken?
No completed controlled human trial has established a dose, frequency, or route, so no human schedule is published.
How does Selank differ from the other compounds in this class?
Selank has been studied in people, but it works through a different system from GLP-1 and amylin drugs. Its doses and results are not directly comparable with theirs.
What is not known about Selank?
It does not prove that the same dose is appropriate in the United States or that uncommon and long-term risks are known.
5primary sources, each with the day we read it — open the documents used on this page
