How sleep works: what pulls you to bed, and what your brain does all night
Caffeine and sleep: why an afternoon coffee still matters at night
Seven hours between a coffee and bed sound like plenty. Caffeine does not leave your body as fast as you might think.
-
1
Your body clears caffeine slowly. In a typical adult, half of it is gone after about 5 hours: this time is its half-life. Then half of what is left takes 5 hours more.
-
2
At 10 pm, when you go to bed, about a third of your 3 pm coffee is still in you, still sitting in receptors.
The rest of this episode is for subscribers
Subscribe to read every premium episode. You can cancel when you want.
Paid yearly: $99 instead of $119.88