Mental wellbeing

Sleep and Your Health

Good sleep is essential for physical and mental health — most adults need around 7 to 9 hours a night, and poor sleep affects mood, weight and immunity.

Written by Meds Global Health Clinical Team · Clinically reviewed by Dr Muhammad Suffyan, MB BS, Founder & Clinical Director · Last reviewed · How we review

What it means

Sleep is a vital, active process during which the body and brain recover, consolidate memory and regulate many functions. Most adults need roughly 7 to 9 hours a night, though needs vary.

Why it matters

Regularly poor or short sleep is linked to low mood, poor concentration, weight gain, weakened immunity, and a higher risk of heart disease and type 2 diabetes. Good sleep supports mental health, energy and overall wellbeing.

Practical tips

How to make it work

  • Keep regular sleep and wake times, even at weekends, to steady your body clock.
  • Wind down before bed — dim lights, avoid screens, and relax.
  • Keep your bedroom dark, quiet, cool and comfortable.
  • Avoid caffeine in the afternoon and evening, and limit alcohol, which disrupts sleep quality.
  • Get daylight and physical activity during the day.
  • If you cannot sleep, get up and do something calming rather than lying awake worrying.

Good to know. See your GP if poor sleep lasts more than a few weeks, you snore loudly and gasp or stop breathing (possible sleep apnoea), or sleep problems are affecting your daily life or mood.

Answers

Sleep and Your Health: frequently asked questions

How many hours of sleep do I need?

Most adults need around 7 to 9 hours a night, though this varies between people. What matters is waking feeling reasonably refreshed and being able to function well during the day.

Does poor sleep really affect my health?

Yes. Ongoing poor sleep is linked to low mood, poor concentration, weight gain, weakened immunity, and higher risks of heart disease and diabetes, as well as day-to-day tiredness and irritability.

Related

More on mental wellbeing

Improving Your SleepSimple habits — a regular routine, a restful bedroom and winding down before bed — can imp…Managing StressSome stress is normal, but ongoing stress affects health — managing it involves recognisin…Looking After Your Mental WellbeingMental wellbeing can be supported by simple, evidence-based steps: connecting with others,…MindfulnessMindfulness means paying attention to the present moment, which can help reduce stress and…

Education and reference only. This is general UK health guidance, not personal medical or dietitian advice. If you have a health condition or specific needs, check with your GP, pharmacist or a registered professional before making big changes.

Sources

Where this is drawn from

  • NHS — Live Well & Every Mind Matters
  • UK Chief Medical Officers’ physical activity guidelines
  • Mind / mental health charities

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