Sleep duration and all-cause mortality: a systematic review and meta-analysis
Cappuccio et al. · Sleep
Study context
Prospective population studies examining sleep duration and mortality.
The finding
Both short and long sleep were associated with higher mortality. Sleep deserves a place among the foundations of long-term health.
What it does not prove
Association is not causation: illness and other lifestyle factors can influence sleep. This is not evidence for a supplement.