Used to measure interleukin-11 (IL-11) levels in human biological samples such as serum, plasma, or cell culture supernatants. It is commonly applied in clinical research and immunology studies to investigate inflammatory diseases, bone metabolism, hematopoiesis, and cancer progression. The kit enables accurate quantification of IL-11, helping researchers understand its role in immune regulation and disease mechanisms. It is also used in drug development to assess the impact of therapeutic agents on IL-11 production.