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New Study Links Insomnia to Higher Risks of Dementia and Stroke

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Sleep problems may affect more than energy levels. New research connects insomnia with higher risks of stroke and cognitive decline, highlighting sleep’s role in long-term brain health.

Insomnia and Stroke Risk

A review in “Sleep Medicine Reviews” examined 20 studies from several countries. The findings linked insomnia to a 26% higher stroke risk. The research also connected insomnia with dementia, depression, suicide, and hospitalizations.

Meanwhile, a Sept. 9 study in “Neurology” described insomnia as a “modifiable risk factor” for cognitive decline. Researchers followed 2,750 people with yearly neurological checks, brain scans, and sleep assessments. Those with insomnia showed a 40% greater risk of cognitive impairment. However, people who slept longer or used sleep medication showed less cognitive harm.

Why Sleep Matters for the Brain

Woman sleeping peacefully at night

Image by stefamerpik on Magnific | Regular sleep helps the brain clear waste, support memory, and maintain healthy brain function.

About 12% of Americans report a chronic insomnia diagnosis, according to the American Academy of Sleep Medicine. Regular sleep helps the brain remove waste and unnecessary synapses that build up during the day. Dr. Diego Carvalho, a Mayo Clinic sleep specialist, also explained that sleep supports memory, emotional balance, and overall brain function.

Better Sleep Starts With Simple Habits

Experts recommend putting phones and other distractions away 30 to 60 minutes before bed. Also, relaxation routines and a dark, quiet, cool bedroom can support better rest.

When insomnia continues despite these changes, a doctor or sleep specialist can help identify the cause and discuss treatment options. Better sleep can support daily wellbeing and long-term brain health.

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