Selank

Selank is a lab-made peptide (a short chain of seven amino acids). It is based on a natural body peptide called tuftsin, which helps the immune system, and it has an extra piece added to one end to help it last longer in the body. It is studied mainly as a research peptide for calming anxiety and affecting the brain.

How it works

Selank does not lock onto one single receptor. Research has looked at how it works with the brain's GABA system (GABA is a calming chemical messenger that quiets nerve signals). Studies reported that Selank changed how GABA binds and shifted the activity of genes tied to this calming system in nerve-like cells grown in the lab [1]. Because it is related to tuftsin, it also keeps some immune-affecting and nerve-affecting properties [2].

What researchers have studied it for (anxiety and behavior)

Early animal work has tested Selank in anxiety and stress setups. One study reported that Selank boosted the anxiety-easing effect of diazepam (a common anti-anxiety drug) in rats under ongoing mild stress [3]. Other rodent work reported it eased the distressing signs of morphine withdrawal about as well as diazepam [4]. These are behavior results in animals.

Effects on brain chemistry and thinking

Researchers have looked at how Selank affects brain messenger chemicals, reporting changes in how the brain handles serotonin (a mood-related messenger) in rats [5], and have used brain-mapping methods to study Selank and a related peptide, Semax [2]. These studies explore how it works rather than prove any result.

What the research hasn't shown yet

Most human data are limited and reported mainly in regional journals; solid, controlled proof that it is safe or works is not established here. This peptide is supplied for laboratory research use only and is not meant for use in people or animals.

Laboratory handling typically involves reconstituting the lyophilized Selank with bacteriostatic or sterile water using gentle agitation. Store lyophilized powder at -20°C, keep reconstituted solution at 2-8°C, shield from light, and limit freeze-thaw cycles to help preserve the peptide.