Selank is a synthetic peptide derived from the human peptide tuftsin, a tetrapetide associated with the immune system. The use of selank has been shown to help improve learning, memory, cognition, depression, and energy in patients. In the human body, selank acts as a stable neuropsychotropic, antidepressant, and antistress to help reduce anxiety and relieve aggression. Through allosteric modulation of GABA receptors, Selank regulates communication between brain cells to help influence processes involved in nootropic action and stimulation of mental activity.