The Most Important Biomarkers for Health and Longevity Blood biomarkers are crucial in assessing an individual's overall health and longevity. While the significance of each biomarker can vary based on a person's age, gender, medical history, and overall health, there are 45 essential blood biomarkers that are commonly used as indicators of health and longevity based on current scientific knowledge. It is important to note that while testing blood biomarkers is a good start, it is not the only way of measuring health and longevity. Other tests and markers that can provide a more comprehensive view of health and longevity include the organic acids test, which measures nutritional and metabolic...