Originally developed in Russia, Selank is a short, heptapeptide which serves as a synthetic counterpart to tuftsin, which is a naturally occurring immunomodulatory peptide that regulates T helper cells, interleukin (IL) 6, monoamine neurotransmitters and others.
In animal studies, Selank has also been shown to elevate the expression of brain-derived neurotrophic factors and even affect serotonin metabolism.