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Excessive Sleep Linked to Faster Brain Aging, Dementia Risk

5/17/2025

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Summary

Story summary

Sleeping nine or more hours a night may accelerate brain aging by 6.5 years, raising the risk of dementia, according to researchers at the University of Texas. In a study of 1,853 adults, they found a troubling connection between excessive sleep and cognitive decline, especially among those battling depression. With Alzheimer's impacting nearly a million in the UK, these findings are particularly alarming.

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Story summary

Sleeping nine or more hours a night may accelerate brain aging by 6.5 years, raising the risk of dementia, according to researchers at the University of Texas. In a study of 1,853 adults, they found a troubling connection between excessive sleep and cognitive decline, especially among those battling depression. With Alzheimer's impacting nearly a million in the UK, these findings are particularly alarming.