Longevity & Aging
topic
Sleep duration and quality are independently associated with longevity in large prospective epidemiological studies — with both short (under 6 hours) and long (over 9 hours) sleep durations associated with elevated all-cause mortality relative to 7–8 hours, and with markers of biological aging (telomere length, epigenetic age acceleration, inflammatory markers) showing accelerated aging in chronically sleep-deprived populations independent of other lifestyle factors.
Role
The sleep-longevity relationship is one of the most robust in all of epidemiology — appearing across cultures, age groups, and health status categories — yet most people managing their longevity through diet, exercise, and supplementation have never been told that the single lifestyle variable with the most consistent, largest-magnitude association with early mortality is insufficient sleep. The person who prioritizes sleep as a longevity intervention is not being passive about health — they are acting on the intervention with the most consistent evidence base for reducing all-cause mortality risk, which happens to require less financial investment than most alternatives.