Lots of deep sleep can delay onset of dementia because brain ‘washes itself’

Getting a good night’s sleep can delay the onset of dementia later in life, scientists have discovered.

How people slumber can be used as a “crystal ball” to predict if they will be hit by Alzheimer’s disease in the future, according to the researchers.

Plenty of deep sleep was found to best delay the onset of dementia because it slows the build up of a toxic plaque in the brain called beta-amyloid.