ATP assays are widely used in research laboratories and clinical settings to quantify levels of adenosine triphosphate, a molecule that serves as the primary energy source for all living organisms. These assays are crucial for assessing cellular metabolism, enzyme activity, and overall cell health. ATP assays utilize a luciferase enzyme system to generate luminescence in the presence of ATP, allowing for sensitive and rapid detection of ATP levels. By measuring ATP concentrations, researchers can gain valuable insights into various biological processes such as mitochondrial function, drug efficacy, and cell viability. Additionally, ATP assays are versatile and can be adapted to different sample types, including cells, tissues, and fluids. Overall, ATP assays play a critical role in advancing our understanding of cellular physiology and have become indispensable tools in the fields of biology and medicine.