Bryan Johnson· Author
The longevity dose for sleep is 6.4 - 7.8 hours.
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The evidence is convergent. Multiple independent sources reach the same conclusion, the underlying mechanism is well-characterized, and even the field's most cautious voices treat it as worth doing.
The longevity dose for sleep is 6.4 - 7.8 hours.
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Too little sleep equates to a 35% increase in all cause mortality
while too much equates to a 50% increase.
The overwhelming amount of sleep epidemiological research shows a U- or J-shaped curve with sleep and lifespan, with the sweet spot being consistently 7-hours of sleep.