What Is Selank? The Anxiolytic Peptide Explained
Selank is the anxiolytic (anxiety-focused) counterpart to Semax — a second peptide from the same Russian neuropeptide research tradition. Where Semax is framed around cognition, Selank is framed around calm. This profile covers what it is, the pathways it is thought to touch, and an honest account of its evidence base.[1]
What the molecule is
Selank is a synthetic heptapeptide based on tuftsin, a naturally occurring peptide fragment better known for its role in the immune system. As with Semax, researchers took the active core and added a stabilizing Pro-Gly-Pro tail so the molecule survives longer in the body. The tuftsin origin is why some of Selank's reported effects extend beyond mood into immune signalling.[2]
How it is thought to work
The leading proposed mechanisms center on the brain's calming chemistry:
- GABA system — the brain's main inhibitory (calming) neurotransmitter; Selank is studied as a modulator of this system, which is also where conventional anti-anxiety drugs act.
- Monoamines and BDNF — like Semax, it is reported to influence serotonin balance and neurotrophic signalling.
- Enkephalin stability — Selank is reported to slow the breakdown of the body's own calming peptides.
Notably, the anxiolytic literature suggests these effects without the sedation or dependence associated with benzodiazepines — a key reason the compound drew research interest.
Where the evidence stands
Selank follows the same pattern as Semax: it is an approved medication in Russia with a domestic clinical record, but it is not approved elsewhere, and independent large-scale Western trials are limited. The mechanistic and animal data are consistent and interesting; the global clinical picture is incomplete. Treat it as a well-characterized regional neuropeptide that remains investigational internationally.
Handling in the lab
Selank is supplied lyophilized and handled like other research peptides — cold, dry storage and prompt use after reconstitution (see reconstitution and storage stability). The catalogue listing is on the Selank product page.
For research use only. Not for human or veterinary use. This article is educational and summarizes published literature; it does not describe or recommend any use in humans and is not medical advice.
References
- National Center for Biotechnology Information. "Selank compound summary." PubChem. pubchem.ncbi.nlm.nih.gov.
- Zozulya AA, Neznamov GG, Myasoedov NF, et al. "Efficacy and possible mechanisms of action of a new peptide anxiolytic Selank." Bulletin of Experimental Biology and Medicine. PubMed.
- Kolomin T, et al. "Selank and its effect on gene expression in the brain." (mechanistic literature). PubMed.