The doctor said that coffee can improve the performance of cognitive function and motor function, but the principle of "not drinking after noon" should be remembered to avoid feeling dizzy in the afternoon and affecting sleep at night.

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[Health Channel/Comprehensive Report] Are you used to starting your day with a cup of coffee?

Chen Shuncheng, Physician of Psychology and Psychology at Wenxinlecheng Clinic, said that there have been many large-scale studies confirming that coffee can improve the performance of cognitive function and motor function, but the principle of "not drinking after noon" should be remembered. It can avoid the feeling of dizziness in the afternoon, and secondly, it will not affect the sleep at night, because caffeine can be eliminated from the human body within about 8 hours.

Chen Yicheng shared on his Facebook page "Dr. Chen Xingcheng x Xixin Firm" and his personal website. As long as it is used wisely, caffeine is a good thing. It can reduce fatigue, increase alertness, shorten reaction time, and stimulate dopamine. Rejuvenation, such as repetitive work, long-distance driving or piloting, is recommended to use coffee to refresh.

In 2001, the U.S. Military Nutrition Research Center reported that 150 mg of caffeine can improve cognitive performance for up to 10 hours.

The National Health Service recommends that adults consume less than 300 mg of caffeine per day.

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Chen Shengcheng explained that after entering the human body, caffeine will be completely absorbed within about 45 minutes, and the highest concentration can be reached within 15 minutes to 2 hours. The half-life of coffee is about 2.5 to 4.5 hours, and it can be eliminated from the human body within about 8 hours. .

Caffeine and Insomnia

Chen Suicheng said that it is well known that drinking coffee can affect sleep, so clinically it is recommended that people with sleep problems, in addition to reducing the consumption of coffee, do not use caffeine-containing substances after noon.

However, caffeine still has an impact on sleep structure. For example, rapid eye movement (REM), which is more frequent when you are about to wake up, will appear earlier, and the deep sleep period (stages 3 and 4) will be shortened.

If you have sleep problems, you should pay attention to reducing the amount of caffeine you use, but for ordinary people, using coffee does not necessarily affect sleep too much.

Going without coffee for a few days works better

Chen Shuncheng said that some studies have shown that if you have not used it for several days in a row, you will feel a sudden increase in sensation when you use it again.

Therefore, if you go to a hotel on vacation, you can take a "coffee vacation" for yourself and drink less for 2-5 days. The next time you drink it, it will increase your brain's response to coffee.

Children and Teens Beware of Energy Drink Use

Chen Shengcheng pointed out that since children and adolescents are still growing and developing, long-term consumption of energy drinks containing caffeine may cause weight loss.

In addition, a can of about 250 ml of energy drink sold in Taiwan contains 50-90 mg of caffeine, but 50-300 mg of caffeine will have a relatively large burden on the hearts of children and adolescents (raise blood pressure , rapid heartbeat), especially children and adolescents with heart problems.

Do not drink coffee with alcohol

Chen Shuncheng said that although drinking a cup of coffee with alcohol in winter will give you a good feeling of happiness, the addition of caffeine and alcohol may create an illusion that you will not get drunk no matter how much you drink.

The U.S. Food and Drug Administration (FDA) prohibits the sale of pre-mixed alcohol and energy drinks.

In addition, drinking alcohol with caffeine is not only easy to drink too much, but also more likely to become addicted.

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