Cytotoxicity is a research area that focuses on the study of substances or agents that are toxic to cells. These substances can include chemicals, drugs, environmental toxins, and even components of living organisms such as proteins or enzymes. Cytotoxicity research aims to understand how these substances affect cells at a molecular level, leading to cell death or damage. This research is important for drug development, toxicology studies, and understanding the effects of environmental exposures on cellular health. Techniques used in cytotoxicity research include cell culture assays, microscopy, flow cytometry, and molecular biology methods.