Used in research settings to measure levels of Vitamin D-binding protein (DBP) in human biological samples such as serum or plasma. This kit enables scientists to study the role of DBP in vitamin D metabolism, immune regulation, and chronic disease states including osteoporosis, autoimmune disorders, and kidney disease. It is also applied in epidemiological studies to assess vitamin D status and transport capacity in populations. The ELISA format allows for high-throughput, quantitative analysis with good sensitivity and specificity, making it a valuable tool in clinical and translational research.