One important biomarker used for measuring longevity is the AST (Aspartate Aminotransferase) enzyme. AST is found in various tissues throughout the body, with the highest concentrations in the heart and liver. Elevated levels of AST in the blood can indicate organ damage or disease, which can impact overall health and longevity. Monitoring AST levels can provide valuable insights into the health of vital organs and help identify potential risk factors for age-related diseases. By keeping a close eye on biomarkers like AST, individuals and healthcare professionals can take proactive steps to promote longevity and overall well-being.