A drink before bed may make you feel drowsy, but experts say the nightcap could leave you with poorer-quality sleep and more night-time awakenings.

For many people, a glass of wine or another alcoholic drink can feel like an easy way to unwind before bed. Alcohol is a sedative, so it may help you fall asleep more quickly. But experts warn that becoming drowsy is not the same as getting restorative sleep.

Alcohol can significantly disrupt sleep quality, even when consumed in relatively small amounts. It can reduce rapid eye movement (REM) sleep, a stage associated with emotional processing and memory consolidation, while also interacting with neurotransmitters involved in sleep regulation. This can increase the likelihood of waking during the night and feeling tired the following day.

What You Eat During the Day Can Affect Your Sleep

The relationship between food and sleep works both ways. A recent systematic review and meta-analysis examining the Mediterranean diet and sleep found that dietary patterns and meal timing may influence sleep quality.

Experts say a Mediterranean-style diet, rich in fruit and vegetables, wholegrains, lean proteins, and healthy fats, may be among the better eating patterns for supporting sleep. Plant foods also contain compounds that may influence inflammation and communication between the gut and brain.

Some foods, including bananas, oranges, tomatoes, nuts, seeds, and wholegrains, have been associated with better sleep. There is also emerging research on kiwi fruit and tart cherries, although experts stress that the evidence remains limited and inconsistent.

Protein may also play a role because it provides tryptophan, an essential amino acid used to produce serotonin and melatonin. Sources include dairy, eggs, fish, meat, whole grains, nuts, seeds and legumes. However, eating one particular food is unlikely to act as an instant sleep remedy.

Timing Matters, Too

Eating a large meal shortly before bed may make it harder to fall asleep because the body is still digesting food.

Later meals have generally been associated with poorer-quality sleep, while one recent trial found that eating dinner one hour before bedtime was linked to reduced sleep continuity and stability.

As a general rule, experts recommend leaving around two to three hours between a meal and bedtime. People who experience acid reflux may need to avoid eating for up to four hours before going to bed, in line with NHS advice.

However, going to bed hungry can also interfere with sleep. If dinner was early and hunger strikes later, a small snack such as yoghurt with fruit and nuts or wholegrain toast with nut butter and banana may be preferable to sugary snacks.

Don't Forget Caffeine

That afternoon or evening coffee may also be contributing to poor sleep. Caffeine can linger in the body for much longer than many people realise, according to Dr Sammie Gill, a senior nutrition scientist at the British Nutrition Foundation. 'Caffeine has a quarter-life of around 10-12 hours, meaning that if you consume it at lunchtime, a quarter of the caffeine is still in your body close to midnight, which can disrupt sleep,' she said.

The NHS recommends avoiding alcohol, tea, and coffee for at least six hours before bedtime. Ultimately, there may be no magic bedtime food or drink. If sleep problems persist, focusing on consistent sleep times, a suitable bedroom environment, regular activity, and limiting alcohol and caffeine may be more useful than relying on a nightcap. Persistent insomnia or frequent night-time waking may also warrant speaking with a healthcare professional.

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Frequently Asked Questions

  • How does alcohol affect sleep quality?
    Alcohol can disrupt sleep quality by reducing REM sleep and increasing the likelihood of waking during the night.
  • What dietary habits support better sleep?
    A Mediterranean-style diet rich in fruits, vegetables, wholegrains, lean proteins, and healthy fats can support better sleep.
  • Why should large meals be avoided before bedtime?
    Large meals should be avoided before bedtime as they can make it harder to fall asleep due to ongoing digestion.
  • What is the recommended time gap between eating and sleeping?
    Experts recommend leaving around two to three hours between a meal and bedtime to avoid sleep disturbances.
  • How does caffeine affect sleep?
    Caffeine has a long-lasting effect and can remain in the body for up to 10–12 hours, potentially affecting sleep if consumed in the afternoon or evening.