Research shows that although one person in seven — and more than a quarter of insomniacs — uses alcohol as an aid to sleep, it actually disrupts sleep, even at comparatively low levels. The more we drink, the more tired we end up. A recent survey conducted for the Department of Health found that 58 per cent of people were unaware that drinking alcohol could disturb a good night’s sleep. The problem isn’t just ignorance — the evidence of our own experience seems to defy the research findings.
How can alcohol be bad for sleep when it so clearly makes me nod off?
There is a real difference between making you go to sleep and sleeping well. Studies have shown that alcohol does, indeed, make you go to sleep more quickly, at least if it’s not drunk in excess — it has a natural sedative effect. However, once you are asleep it disrupts what scientists call “sleep architecture” — the pattern of sleep and brain waves that leaves you feeling refreshed in the morning. We need the right balance of REM sleep (dreaming sleep) and non-REM sleep (including deep sleep), and alcohol disturbs this.
“Alcohol can mean that sleep is no longer refreshing, because the brain can’t perform the normal restorative job it does during the night,” says Jessica Alexander, of the Sleep Council, which provides information about sleep and health.