Caffeine in the evening and sleep - short answer
Why late coffee can make sleep lighter even if you fall asleep on time.
Published: January 25, 2026 · 1 min
Caffeine in the evening and sleep - short answer
Caffeine can make sleep lighter even when falling asleep feels normal.
In short
- The half life of caffeine lasts hours.
- Dose and sensitivity change the effect.
- The night can feel shorter in quality even if duration looks fine.
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This is an editorial explanation, not a consultation.
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