Research-use-only context. This article summarizes published third-party scientific literature — the large majority of it conducted in cultured cells or animal models. It is not medical advice, not a therapeutic or performance claim, and not a usage guide. American Peptides products are sold strictly for in vitro laboratory research and are not for human or veterinary use.
Selank, like semax, is a Russian-developed research peptide with a literature concentrated on the central nervous system. This summary surveys what the peer-reviewed studies report and where the evidence stands. For the format used across this series, see our BPC-157 research review.
What selank is
Selank is a synthetic heptapeptide derived from tuftsin, a naturally occurring immunomodulatory peptide, with sequence modifications for stability. It is studied for central-nervous-system and immune-related effects.
What the research reports
Rodent behavioral studies examine selank in anxiety and stress models: a 2017 study reported it enhanced the anxiety-reducing effect of diazepam in a chronic-mild-stress rat model, and a 2019 study reported effects on BDNF content in the hippocampus and prefrontal cortex in a rat memory model. At the molecular level, a 2016 Frontiers in Pharmacology study reported effects on genes involved in GABAergic neurotransmission, and a 2018 review summarized the molecular aspects of its biological activity. These are behavioral and gene-expression findings in rats.
The human-evidence gap
As with semax, selank is used clinically in Russia but is not FDA-approved, and the independent international literature is dominated by rodent studies. Large, controlled human trials are limited.
The takeaway
Selank has a consistent rodent behavioral and gene-expression literature centered on stress, anxiety, and GABAergic and neurotrophic signaling. The human evidence, internationally, remains thin.
Frequently Asked Questions
What is selank derived from?
The natural immunopeptide tuftsin, modified for stability; it is studied for central-nervous-system and immune-related effects.
What models is selank studied in?
Primarily rat behavioral models of anxiety and stress, plus gene-expression studies of pathways such as GABAergic neurotransmission.
Is selank approved by the FDA?
No. It is used clinically in Russia but is not FDA-approved. American Peptides supplies it strictly for in vitro research.
Does selank affect BDNF in studies?
A 2019 rat study reported effects on BDNF content in the hippocampus and prefrontal cortex; the findings are preclinical.
Citations
- “Peptide Selank Enhances the Effect of Diazepam in Reducing Anxiety in Unpredictable Chronic Mild Stress Conditions in Rats.” Behav Neurol. 2017. PubMed: PMID 28280289
- “Selank, Peptide Analogue of Tuftsin, Protects Against Ethanol-Induced Memory Impairment by Regulating BDNF Content in the Hippocampus and Prefrontal Cortex in Rats.” Bull Exp Biol Med. 2019. PubMed: PMID 31625062
- Kolomin T, et al. “Selank Administration Affects the Expression of Some Genes Involved in GABAergic Neurotransmission.” Front Pharmacol. 2016. PubMed: PMID 26924987
- “Peptide-based Anxiolytics: The Molecular Aspects of Heptapeptide Selank Biological Activity.” Protein Pept Lett. 2018. PubMed: PMID 30255741
Related reading: For the biology of focus, memory, and mental clarity behind this research — and how it all connects — see Why We Get Brain Fog: The Biology of Focus, Memory, and Mental Clarity.
This article is for laboratory research reference only. American Peptides products are sold strictly for in vitro research. Not for human consumption.
Compliance Notice: American Peptides products are sold strictly for laboratory and academic research purposes only. They are not intended for human or veterinary consumption, diagnosis, treatment, or prevention of any disease. All content on this page is educational in nature and does not constitute medical advice or product claims. Researchers are responsible for handling these compounds in accordance with their institution’s safety protocols and applicable laws.
