In the study of longevity, biomarkers play a crucial role in assessing an individual’s health and predicting their potential lifespan. One such biomarker is fibrinogen, a protein found in blood plasma that plays a key role in blood clotting. Elevated levels of fibrinogen have been associated with an increased risk of cardiovascular disease and mortality, making it an important biomarker to monitor for longevity purposes. By tracking fibrinogen levels over time, researchers and healthcare professionals can gain valuable insights into an individual’s cardiovascular health and overall risk of age-related diseases, offering potential opportunities for intervention and improved longevity.