Getting less than six hours sleep a night increases risk of early death, The Independent

Not sleeping releases hormones that increase stress levels, speed up the heart rate and raise blood pressure

Sleeping less than six hours a night skews activity of hundreds of genes, Medical research

Simple weekly change can 'slash the risk of insomnia and ensure you get 6-9 hours sleep a night

Sleeping less than 6 hours a night in midlife raises risk of dementia 30%, study finds

53 Sleep Statistics: How Many People Are Sleep Deprived?

Poor sleep linked to dementia and early death, study finds

Less Than 6 Hours Of Sleep Could Be Deadly For Some

Not sleeping sufficiently? Less than 6 hours of sleep can double death risk

This is what happens if you get less than six hours of sleep a night

Why am I always tired if I get enough sleep?