ELISA Kits are laboratory diagnostic tools used to detect and measure specific antibodies, antigens, proteins, hormones, and other biological substances in samples such as blood or serum. They are widely used in hospitals, diagnostic laboratories, research centers, blood banks, and medical institutions for disease screening, diagnosis, and research. ELISA kits offer sensitive and reliable testing through an enzyme-based reaction that produces a measurable color change, helping laboratory professionals obtain accurate and reproducible results.