Selank

Mechanism of action

Proposed multifactorial mechanism: (1) neuromodulation of the GABAergic system (hypothesized increase in inhibitory tone and reduction of anxiety without marked sedation in some models); (2) modulation of monoaminergic systems (serotonin/dopamine/norepinephrine) and neuroactive peptides; (3) possible effects on the gene expression of neurotrophic factors and on mediators of inflammation/neuroinflammation; (4) indirect interaction with the stress axis (HPA) and the stress response. The intranasal route has been used to promote “nose-to-brain delivery,” reducing systemic exposure and gastrointestinal degradation.

Supported benefits

• Reduction of anxiety symptoms/perceived stress in some clinical and observational studies (mainly Russian literature, often with small samples and variable reporting) (limited)
• Possible improvement in attention/memory or cognitive performance in contexts of stress or anxiety (data are not uniform; many results derive from preclinical research) (emerging)
• Proposed immunomodulatory/anti-inflammatory effects (conceptually derived from tuftsin; robust human evidence not established) (emerging)

Safety & side effects

• Nasal irritation, rhinorrhea, sneezing, or local discomfort (intranasal route)
• Headache or a sensation of pressure
• Drowsiness or, conversely, restlessness (individual variability)
• Nausea or nonspecific malaise
• Allergic/hypersensitivity reactions (rare but possible, especially with excipients or impurities)

FAQ

Is Selank a supplement like vitamins or amino acids?

No. It is a synthetic peptide with biological activity on the nervous system and potentially on the immune system. It is not an essential nutrient and has no dietary role.

Is there solid evidence that it works for anxiety?

The evidence is limited: there are studies and clinical reports suggesting an anxiolytic effect, but often with small samples, non-uniform methodologies, and limited data availability according to modern RCT standards. Larger independent studies are needed.

Why is the intranasal route often used?

Because peptides are easily degraded in the gastrointestinal tract, and the intranasal route has been studied to promote access to the CNS through “nose-to-brain” pathways. However, human pharmacokinetics remain incompletely characterized.

Can it cause dependence like benzodiazepines?

It is not typically described as a substance with dependence potential comparable to benzodiazepines, but systematic data on abuse, tolerance, and discontinuation are insufficient for definitive conclusions.

Is it safe to use long term?

There are no robust long-term safety data. Prolonged use increases uncertainty regarding rare effects, neurochemical adaptations, and risks related to uncontrolled products.