Used to quantitatively measure interleukin-23 (IL-23) levels in human serum, plasma, or cell culture samples. IL-23 is a key cytokine involved in inflammatory and immune responses, particularly in the differentiation and maintenance of Th17 cells. This ELISA kit is widely applied in research on autoimmune diseases such as psoriasis, inflammatory bowel disease (IBD), and multiple sclerosis. It enables researchers to monitor IL-23 expression in clinical samples, evaluate therapeutic responses, and investigate the role of IL-23 in disease mechanisms. The assay provides high sensitivity and specificity, making it suitable for both basic research and drug development studies targeting the IL-23/Th17 pathway.