As life expectancy in the U.S. rises, so does the country's broader conversation around the pursuit of longevity. Billionaires are spending big in hopes of extending their lifespan for as long as they can. The world's longest-living people share their "secrets" to longevity , intended for the average person to achieve optimal health, too. For some people, being healthy entails a lot more than it used to these days — from wearable devices to track your "good" hours of sleep to at-home DNA tests

Tag-uri: DNA