Used to measure interleukin-13 (IL-13) levels in human biological samples such as serum, plasma, or cell culture supernatants. It is commonly applied in research settings to study immune responses, allergic diseases like asthma, and inflammatory conditions. The kit enables accurate quantification of IL-13, helping in the evaluation of Th2-mediated immune activity and assessing the effectiveness of therapeutic interventions targeting cytokine pathways. Widely used in clinical research and drug development for inflammatory and allergic disorders.