Used in biomedical research to measure neopterin levels in biological samples such as serum, plasma, or urine. It is commonly applied in studies related to immune system activation, as elevated neopterin levels indicate cellular immune responses. Researchers use this kit in investigations involving viral infections, autoimmune diseases, cancer monitoring, and transplant rejection. The assay provides a sensitive and quantitative method to assess oxidative stress and inflammation linked to various pathological conditions. Widely utilized in clinical laboratories and research institutions for immunoassay-based detection.