Here's why coffee keeps you up at night

September 17, 2015 2:31 PM

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Here's why coffee keeps you up at night

Everyone knows that people who say they can drink a cup of coffee and fall right asleep are just fooling themselves. A new study shows why.

Caffeine, it found, disrupts the circadian rhythm — the internal clock that tells the body when to sleep and when to wake up.

Also read: Bill Maher on Milo Yiannopoulos's downfall: 'You're welcome'

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