New research in the United States shows that a cup of coffee lasts for six hours

The Daily Mail reported on November 15 that a new study found that the stimulating effect could last for six hours. Drinking coffee after 5 o'clock in the afternoon can easily lead to an hour of sleep loss at night. As a result of drinking coffee late, easily lead to night sleep disorders, sleep shortening and sleep quality home.

In the new study, Christopher Drake, a professor of psychiatry at Wayne State University in the United States, and his colleagues studied the sleep habits of 12 participants, giving them 400 milligrams (the equivalent of 2 to 3 cups of coffee). During the 4-day trial, participants took tablets 6 hours, 3 hours before bed and before turning off the lights every day, one of which was a placebo. It turns out that drinking a large cup of espresso after 5pm can lead to sleeplessness at night and drowsiness during the day, and even drinking two or three cups of coffee six hours before going to bed can lead to an hour of sleep loss.

Professor Drake pointed out that many people know that drinking coffee before going to bed can make it hard to fall asleep, but little is known about the fact that drinking coffee in the afternoon can also lead to sleep disorders at night. Dr. Safwan Badrel, an expert from the American Society of Sleep Medicine, said that sleep experts have been wondering that intake may interfere with sleep for a long time, and the new study provides objective evidence for the sleep experts' hypothesis. it also further supports the health advice that it is better to sleep without drinks in the afternoon and in the evening.

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