What Your Blood Tests May Reveal About Healthy Aging and Longevity

The results of the Swedish longevity study add to a steadily expanding field of research suggesting that reaching advanced ages is influenced by many interconnected biological and lifestyle factors rather than a single determining cause.

Importantly, the researchers did not discover any single blood test capable of predicting with certainty whether a person will live to 100. Instead, what emerged was a consistent pattern: individuals who achieved exceptional longevity often displayed relatively stable and balanced metabolic profiles over many years.