Selank is a synthetic heptapeptide analog of the immunomodulatory peptide tuftsin that has been studied in preclinical in-vitro and animal models for its interactions with the central nervous system, neurotransmitter metabolism (notably serotonin and dopamine regulation), and brain-derived neurotrophic factor (BDNF) pathways. It is used as a reference compound in comparative neurochemical and psychopharmacology research. Selank is supplied as a lyophilized research material and is studied for its receptor-binding, anxiolytic signaling, and stress restoration characteristics under controlled experimental conditions. This product is intended for laboratory and research use only. Not for human consumption.