Used in research on neurological disorders due to its role in the kynurenine pathway, which is linked to neuroprotection and neurotoxicity. It serves as a precursor for metabolites that influence glutamate receptors and oxidative stress in the brain. Studied in relation to depression, schizophrenia, Alzheimer's disease, and Huntington's disease. Also used in immunology research because it modulates immune responses through activation of the aryl hydrocarbon receptor. Commonly applied in cell culture studies to examine immune tolerance and neuroinflammation.