A new study published in SLEEP Advances suggests that sleeping less than seven hours per night may shorten lifespan, with sleep duration showing a stronger correlation to life expectancy than diet, physical activity, or social isolation. Researchers from Oregon Health Science University analyzed national data, comparing life expectancy figures with CDC survey data. While smoking was found to have a greater impact, the study emphasizes the critical role of adequate sleep, recommending seven to nine hours nightly for improved longevity and overall health.