Selank is a synthetic heptapeptide derived from the endogenous tuftsin sequence, with additional proline residues modified to improve peptide stability and biological activity. It is widely studied as a regulatory peptide targeting the central nervous system, capable of modulating multiple neurotransmitter systems including serotonin, dopamine and GABA pathways. In preclinical research models, Selank demonstrates anxiolytic, stress-modulating and mood-stabilizing properties without producing strong sedative effects or significant addictive potential commonly observed with traditional anxiolytic agents. It can regulate the expression of pro-inflammatory cytokines and balance immune function under stress conditions, linking neuropsychological stress response and peripheral immune regulation. Selank also shows research value in studies focused on cognitive performance, attention and adaptation to chronic stress. The proline-rich sequence structure resists rapid enzymatic breakdown in biological environments, extending its active window in laboratory assays. Manufactured through standard Fmoc solid-phase peptide synthesis, each production batch undergoes full quality control including HPLC purity analysis, mass spectrometry identity verification, endotoxin testing and residual solvent inspection to ensure reliable batch consistency. The lyophilized powder form effectively prevents hydrolysis and oxidation during shipment and long-term storage. Researchers commonly use Selank in cell-level neurobiology assays, animal stress models, and combined-peptide formulation studies to explore synergistic effects with other neuropeptides. This material is supplied solely for laboratory testing, academic research and formulation development purposes.