Used to measure interleukin-33 (IL-37) levels in human biological samples such as serum, plasma, or cell culture supernatants. IL-33 is involved in inflammatory responses, allergic reactions, and immune regulation. The kit helps in research on asthma, atopic dermatitis, rheumatoid arthritis, and other immune-mediated diseases. It enables quantification of IL-33 for monitoring disease progression or evaluating therapeutic interventions in clinical and research settings.