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Study finds why poor sleep and high blood pressure may increase dementia risk

October 24, 2025

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New research links dementia to problems with the brain’s waste clearance system. Asya Molochkova/Stocksy

The ‘glymphatic system’ — the flow of cerebrospinal fluid during sleep to flush out toxins and waste materials from the brain — plays an essential role in keeping the brain healthy.
A new study, using MRI scans, found that people with cardiovascular risk factors that impaired the function of the glymphatic system had an increased risk of dementia.
The researchers suggest that…

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