What is Selank?
Selank is a small lab-made peptide — a chain of seven amino acids: Thr-Lys-Pro-Arg-Pro-Gly-Pro. (A peptide is just a short chain of amino acids, the building blocks that make up proteins.) It's a copy of tuftsin, a natural peptide the body's immune system makes, with a short Pro-Gly-Pro tail added on the end so the body breaks it down more slowly. In the research, Selank is usually described as an 'anxiolytic' (studied for calming and anxiety) and 'nootropic' (studied for thinking and memory) peptide.
Selank was developed by scientists at the Institute of Molecular Genetics and the V.V. Zakusov Research Institute of Pharmacology of the Russian Academy of Sciences, and most of the published work on it comes from that group. One thing to be clear about: Selank is only for laboratory research. It is not a medicine, and it is not for use in people or animals.
The quick version
A seven-piece peptide
A copy of the natural immune peptide tuftsin, with a small tail added so it lasts longer in the body.
The calming-system angle
Research describes Selank as something that helps the brain's main calming system (GABA) work better, rather than switching it on directly.
Research use only
Studied in anxiety, stress, and memory models — never for people or animals.
99%+ pure
Double-checked by lab testing (HPLC and LC-MS) and shipped with a certificate for every batch.
Explore research-grade Selank
99%+ pure, with a certificate of analysis for every batch, and fast U.S. shipping — for laboratory research use only.
View SelankHow Selank is thought to work
Because Selank is a short peptide, scientists have looked at a few different paths to explain what it does. No single one fully explains the reported effects, but a few themes keep coming up:
- The brain's calming system (GABA) — lab tests describe Selank as something that helps the brain's main calming signal work better. It does this in its own way, different from how well-known calming medicines (benzodiazepines like diazepam) work.
- The body's natural pain-relief system — studies report that Selank affects enkephalins (the body's own painkiller-like signals), and that a blocker called naloxone can change its effects.
- Brain-cell growth and immune signals — because it's copied from tuftsin, Selank has been looked at for effects on brain-cell growth signals and on immune-related genes in lab models.
One thing that comes up a lot: Selank has been studied together with benzodiazepines like diazepam, where early research looked at how the peptide changes their effect. This mix of signals is a big reason Selank draws interest as its own kind of research tool.
How Selank compares to similar compounds
Selank often comes up next to Semax, another lab-made peptide from the same Russian research programs. Both are short peptides studied in brain research, but they're built from different starting molecules and are studied for different things:
| Compound | Built from | What scientists study it for | Type |
|---|---|---|---|
| Selank | A copy of tuftsin | Calm / stress models | Short peptide (7 pieces) |
| Semax | A piece of ACTH | Memory / brain-cell protection | Short peptide (7 pieces) |
| Tuftsin | The body's own peptide | Immune-system research | Natural immune peptide |
Peptora carries research-grade versions of several related peptides, including Selank and Semax — each with its own certificate of analysis.
What scientists actually study it for
In the lab, Selank usually comes up in a few connected areas:
- Anxiety — animal behavior tests (like a raised, open-armed maze) have been used to look for calming effects in rodents.
- Stress and withdrawal — early research has looked at Selank in long-term-stress and drug-withdrawal tests.
- Thinking and memory — some studies report memory-related effects and changes in learning behavior.
- Body signals — the brain's calming system, the natural pain-relief system, and brain-cell growth signals have all been looked at to explain what's seen.
Purity and testing (why the certificate matters)
In research, your results are only as trustworthy as the material you start with. Every batch of Selank from Peptora is checked to 99%+ purity by HPLC, confirmed by a second test (LC-MS) that proves it's the right molecule, and run through a full quality-control panel before it ships. Every order comes with a certificate of analysis (COA) for that exact batch.
Researchers often choose Peptora because this paperwork is standard here, not an extra. To learn what the numbers on a certificate mean, see the guide on the certificate of analysis.
How it's handled in the lab
Selank ships as a freeze-dried powder (a dry powder with the water removed). Before it's used in research, it's mixed with bacteriostatic water — a special sterile water, sold separately. A little care keeps the peptide intact so the results stay reliable:
- 1Let the sealed vial warm up to room temperature before opening it.
- 2Add the water slowly down the side of the vial, then swirl gently — don't shake.
- 3Wait until the powder is fully dissolved before drawing anything out.
- 4Keep the mixed solution in the fridge, away from light.
Step-by-step details are in the reconstitution guide. Doing these the same way every time is one of the easiest ways to keep research consistent.
Scientific references
Selank has been studied in cells, animals, and some human research over about two decades. The studies listed below are here for background, from PubMed. They describe research on the compound itself — not the laboratory research product Peptora supplies.
- 1Vyunova TV, Andreeva L, Shevchenko K, Myasoedov N. Peptide-based Anxiolytics: The Molecular Aspects of Heptapeptide Selank Biological Activity. Protein Pept Lett. 2018;25(10):914-923. doi:10.2174/0929866525666180925144642.
- 2Kasian A, Kolomin T, Andreeva L, et al. Peptide Selank Enhances the Effect of Diazepam in Reducing Anxiety in Unpredictable Chronic Mild Stress Conditions in Rats. Behav Neurol. 2017;2017:5091027. doi:10.1155/2017/5091027.
- 3Kolik LG, Nadorova AV, Kozlovskaya MM. Efficacy of peptide anxiolytic selank during modeling of withdrawal syndrome in rats with stable alcoholic motivation. Bull Exp Biol Med. 2014;157(1):52-55. doi:10.1007/s10517-014-2490-4.
- 4Panikratova YR, Lebedeva IS, Sokolov OY, et al. Functional Connectomic Approach to Studying Selank and Semax Effects. Dokl Biol Sci. 2020;490(1):9-11. doi:10.1134/S001249662001007X.
- 5Medvedev VE, Tereshchenko ON, Kost NV, et al. Optimization of the treatment of anxiety disorders with selank. Zh Nevrol Psikhiatr Im S S Korsakova. 2015;115(6):33-40. doi:10.17116/jnevro20151156133-40.
Explore research-grade Selank
99%+ pure, with a certificate of analysis for every batch, and fast U.S. shipping — for laboratory research use only.
View SelankKey takeaways
- Selank is a small lab-made peptide (Thr-Lys-Pro-Arg-Pro-Gly-Pro), a copy of the natural immune peptide tuftsin with a small tail added.
- Scientists study it as a calming ('anxiolytic') and thinking-and-memory ('nootropic') peptide, mostly in stress and memory models.
- Published work describes how it works with the brain's calming system (GABA), the body's natural pain-relief system, and brain-cell growth signals.
- Much of the research comes from a single Russian research group and is still evolving, not clinically settled.
- Every batch is 99%+ pure (checked by HPLC and LC-MS) and comes with a certificate of analysis, supplied for research use only.
Frequently asked questions
This article is intended solely as an educational summary of publicly available scientific literature. Products offered by Peptora are supplied exclusively for laboratory research purposes and are not approved for human or veterinary use. The information presented should not be interpreted as medical advice, treatment recommendations, or clinical guidance.
