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Coffee in the evening affects sleep, says study
Posted on: 15/Feb/2018 11:10:35 AM
According to research led by the University of Colorado Boulder and the Medical Research Council`s Laboratory of Molecular Biology in Cambridge, England, evening caffeine delayed the internal circadian clock that tells us when to get ready for sleep and when to prepare to wake up.
Say the researchers, The amount of caffeine in a double espresso or its equivalent three hours before bedtime induced a 40-minute phase delay in the roughly 24-hour human biological clock. The study also showed how caffeine affected cellular timekeeping in the human body. This is the first study to show that caffeine, the mostly widely used psychoactive drug in the world, has an influence on the human circadian clock. It also provides new and exciting insights into the effects of caffeine on human physiology. The results may help explain why caffeine-drinking night owls go to bed later and wake up later and may have implications for the treatment of some circadian sleep-wake disorders. The new results could benefit travelers. Properly timed caffeine use could help shift the circadian clocks of those flying west over multiple time zones.
The study is published online in Science Translational Medicine.
