(CNN) – Trouble sleeping could mean more than just feeling tired – it may raise the risk of dementia later in life.

That’s according to a study published Wednesday in the journal “Neurology.”

Researchers ran brain scans and sleep assessments on nearly 3,000 people over five years.

They found those with insomnia faced a 40% higher chance of cognitive decline.

However, those who improved their sleep with medication or lifestyle changes didn’t see the same risks.

Doctors say good rest is essential for memory, emotional health and even clearing out brain waste linked to Alzheimer’s disease.

Experts recommend simple steps like a consistent bedtime and a cool, dark, quiet room.

You should also limit caffeine, alcohol and screen time and get regular exercise.

If that’s not enough, conside

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