Coffee at night disrupts body's internal clock: study

Miami

DRINKING coffee before bedtime disrupts the body's internal clock, making it harder to get to sleep on time and more challenging to wake up in the morning, US researchers said on Wednesday.

The findings in the journal Science Translational Medicine not only explain why evening caffeine-drinkers may stay up - and wake up - late, but could also offer travellers a way to time their caffeine use in order to limit the effects of jet lag, researchers said.