Why caffeine disrupts sleep
- Blocks “sleep pressure” signals (adenosine).
- Can reduce deep sleep and increase night waking.
- Effects vary — some people are more sensitive.
Caffeine & sleep
Caffeine can improve focus and performance — but timing matters. Many people still “fall asleep” yet get worse quality sleep.
General wellbeing information only — not medical advice.
Quick answer
If sleep is a priority, use a simple rule: stop caffeine 8–10 hours before bed. If you’re sensitive, move the cut-off earlier.
Simple steps that work
- Keep caffeine earlier, not “all day”.
- Swap the afternoon coffee for decaf or tea (if tolerated).
- Avoid energy drinks late (often the biggest offender).
If you’re exhausted
- Fix wake time first (stabilises rhythm).
- Use daylight and a short walk in the morning.
- Keep naps short and earlier.