Peroxidase from horseradish is widely used in biochemical research and diagnostic applications. It plays a crucial role in enzyme-linked immunosorbent assays (ELISAs) to detect the presence of antibodies or antigens in samples. This enzyme is also employed in immunohistochemistry to visualize specific proteins in tissue sections, aiding in disease diagnosis. Additionally, it is utilized in biosensors for detecting hydrogen peroxide and other analytes due to its high catalytic efficiency. In the food industry, it helps in improving the quality and shelf life of products by removing undesirable compounds. Its ability to catalyze oxidation reactions makes it valuable in environmental applications, such as wastewater treatment and pollutant degradation.