Bryan Johnson· Author
persistent shorter sleep (6 hours or shorter) in 50s and 60s was associated with a 30% increase in dementia risk by 30%.
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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.
persistent shorter sleep (6 hours or shorter) in 50s and 60s was associated with a 30% increase in dementia risk by 30%.
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I think the evidence is quite clear that insufficient sleep is a causal risk for dementia.
A new study shows that getting fewer than 5 hours of sleep per night may double the risk of developing dementia.