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Why? drink coffee and feel refreshed
Drinking coffee increases the alertness of the body and brain. Awaken the freshness and clear the mind. Several studies show that caffeine intake can help boost your energy during the day.
For example, one study in which healthy participants took 250 milligrams of caffeine twice daily at 9:00 a.m. and 1:00 p.m. for three days found that caffeine reduced sleepiness. Increase alertness and focus during the day as well.
thanks for the source
1.Faculty of Pharmacy Mahidol University