#415 ‒ AMA #91: Understanding lab testing: what blood work can and cannot tell you about your health and disease risk

Lab testing serves as a valuable but incomplete tool for assessing health, providing only about a quarter of the necessary data to understand an individual's long-term risk profile. While often treated as a definitive health report card, blood work cannot capture essential components of healthspan, such as physical mobility, cognitive function, and emotional well-being. Effective clinical assessment requires longitudinal data rather than isolated snapshots, as single results can be skewed by laboratory errors or transient factors like recent illness or dietary changes. True health evaluation must be framed through the lens of longevity, specifically targeting the prevention of major chronic diseases—cardiovascular, metabolic, oncological, and neurodegenerative—while acknowledging that many critical health indicators remain outside the scope of standard blood draws. Relying solely on numerical reference ranges often leads to a false sense of security, necessitating a more nuanced, comprehensive approach to medical diagnostics.