Apoptosis assays are laboratory tests used to measure the process of programmed cell death, known as apoptosis. These assays help researchers understand how cells respond to various stimuli, such as drugs or stress, and can indicate whether a treatment is effective in inducing cell death in cancer cells or other diseased cells. There are several types of apoptosis assays, including Annexin V staining, caspase activity assays, and DNA fragmentation assays. Each method has its own advantages and can provide insights into different aspects of the apoptosis process, helping scientists develop targeted therapies and improve our understanding of cellular health.