Coffee and health: how many cups a day is considered normal
Coffee gets called both a bad habit and a healthy drink. Here is how much caffeine is considered safe and how coffee affects sleep and energy.
The scientific view of coffee has shifted in recent years: instead of a flat 'it's bad for you', research increasingly shows moderate benefits with sensible consumption.
How much coffee counts as normal
For most healthy adults, around 400 mg of caffeine a day — roughly 3-4 cups of average coffee — is considered moderate. Individual sensitivity to caffeine, however, varies a lot.
How coffee affects sleep
Caffeine can stay in the body for several hours, affecting your ability to fall asleep even 6-8 hours after a cup. If you have sleep issues, it's worth watching how afternoon coffee specifically affects you.
Who should be more careful
- People with higher anxiety — caffeine can make symptoms worse.
- Anyone with heart rhythm issues — better to discuss the right amount with a doctor.
- Pregnant women — limiting caffeine intake is recommended.
For how screens affect sleep, see "Blue light and sleep", and for napping, "Daytime napping".