The kynurenine pathway is a metabolic pathway involved in the degradation of the amino acid tryptophan. It is a key route for the production of various metabolites that have important biological functions, such as regulating immune responses and neurotransmission. Dysregulation of the kynurenine pathway has been implicated in various diseases, including neurodegenerative disorders, autoimmune diseases, and psychiatric disorders. Researchers are studying the kynurenine pathway to better understand its role in health and disease and identify potential therapeutic targets.