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Poor Sleep Accelerates Brain Aging, Raises Dementia Risk

10/10/2025

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Summary

Story summary

Poor sleep is linked to accelerated brain aging; brain age rises by six months per drop in sleep quality.
The finding uses brain-age estimates from 27,500 UK Biobank participants, with magnetic resonance imaging (MRI) data, classified as healthy, intermediate, or poor sleepers.
Inflammation explains 10% of the sleep–brain-age link; chronic insomnia may raise dementia risk via inflammation and waste clearance.

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Story summary

Poor sleep is linked to accelerated brain aging; brain age rises by six months per drop in sleep quality.
The finding uses brain-age estimates from 27,500 UK Biobank participants, with magnetic resonance imaging (MRI) data, classified as healthy, intermediate, or poor sleepers.
Inflammation explains 10% of the sleep–brain-age link; chronic insomnia may raise dementia risk via inflammation and waste clearance.