Used in biochemical research to study enzyme activity and metabolic pathways, particularly those involving tryptophan metabolism. It serves as a precursor in the synthesis of various biologically active compounds, including serotonin and melatonin analogs. Applied in neuroscience studies to explore neurotransmitter regulation and its impact on behavior and mood. Also utilized in pharmaceutical development to investigate potential therapeutic agents for neurological and psychiatric disorders. Its role in modulating indoleamine pathways makes it valuable for understanding immune system interactions and potential applications in immunology research.