Used to measure levels of interleukin-1 (IL-1) in biological samples such as serum, plasma, or cell culture supernatants. Commonly applied in immunology and inflammation research to study immune responses, autoimmune diseases, and infectious conditions. Helps evaluate the role of IL-1 in disease progression and response to treatment. Widely used in preclinical studies and biomarker validation. Suitable for high-throughput screening in drug development targeting inflammatory pathways.