What is cell viability?

Cell viability assays are used to determine the number of healthy, living cells in a sample. These assays are crucial in various research fields, including drug discovery, toxicology, and cancer biology, to assess the effects of different treatments or conditions on cell survival. Common methods include dye exclusion assays (e.g., trypan blue), metabolic activity assays (e.g., MTT, resazurin), and ATP quantification.