Sleep

Your Personal Caffeine Curfew

Caffeine's half-life is longer than most people realize.

3 minQuick ReadSleep Support

Caffeine has a 5–7 hour half-life, so a 3pm coffee still has meaningful caffeine at bedtime.

Slow metabolizers (many women) feel this even more strongly.

Practical steps

  1. 1Set a personal cutoff 8–10 hours before your bedtime.
  2. 2Swap afternoon coffee for herbal tea, matcha, or decaf.
  3. 3Notice sleep-quality changes over a week.

Try This Today

Move your last coffee 2 hours earlier this week.

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