Selank / N-Acetyl Selank is a synthetic analogue of the natural peptide tuftsin, researched for its potent anxiolytic (anti-anxiety), cognitive-enhancing, and immunomodulatory effects. It may support memory, learning, stress resilience, and mood regulation by modulating the GABAergic system and influencing gene expression. The N-acetyl form offers improved stability, potency, and blood–brain barrier penetration, enhancing its potential effectiveness.