For westerners, coffee is an indispensable drink in life. Whether it is waking up in the morning to wake up the soul in sleep, refreshing at work or leisure in afternoon tea, it is inseparable from coffee.
“Caffeine” is a natural ingredient in more than 60 plant leaves, seeds or pulp, such as coffee beans, cocoa beans, cola beans and tea. The most common food sources are coffee, tea, chocolate and cool drinks (such as cola and tea drinks). Coffee can reduce fatigue and enhance memory due to its mild central nervous stimulation Reasoning and intellectual flexibility
As long as 32 mg less (about the content of a cup of coke) can improve the auditory and visual response time, but everyone’s sensitivity to caffeine is very different. Some people feel that the amount of caffeine to increase flexibility may make some people feel uncomfortable, and the elderly may be more sensitive to the utility of caffeine.
The debate seems to be going on whether coffee brings more benefits or more harm to health. How much coffee should I drink every day?
1 cup of coffee
Benefits: after studying 485 elderly people over 65, Greek researchers found that a cup of coffee a day can maintain arterial health and stabilize blood pressure. A survey of 600 volunteers by the University of Bristol in the UK also shows that a cup of coffee a day can enhance brain power.
Disadvantages: caffeine takes 8 hours to be completely excreted, so if you drink coffee after 3 or 4 p.m., you are prone to sleep disorders.
2 cups of coffee
Benefits: a University of Florida study found that 200 mg of caffeine, equivalent to two cups of coffee, can prevent memory loss and Alzheimer’s disease. Research in the International Journal of sports medicine also shows that drinking coffee 30 minutes before exercise helps improve performance.
Disadvantages: if you are pregnant, your coffee intake should be less than two cups, otherwise it will increase the risk of miscarriage.
3 cups of coffee
Benefits: a study published in the American Journal of chemical medicine found that three cups of coffee a day could reduce women’s risk of ovarian cancer by one-fifth. Men who drank three glasses a day had a 40% lower risk of gallstones.
Disadvantages: a 2006 study in the United States showed that three cups of coffee a day increased heart rate and blood pressure, which may increase the risk of heart attack.
4 cups of coffee
Benefits: a study by the University of Utah found that four cups of coffee contain about 400 mg of caffeine, which can reduce the risk of oral and laryngeal cancer by 39%. In addition, it can reduce the risk of colon cancer, breast cancer and type II diabetes.
Cons: four cups of coffee a day doubles the risk of rheumatoid arthritis.
More than 5 cups
Benefits: a 10-year study of 90000 people by researchers in Tokyo found that five cups of coffee a day could reduce the risk of liver injury by three-quarters.
Disadvantages: caffeine interferes with calcium absorption and increases the risk of osteoporosis. Drinking too much will accelerate the loss of minerals and vitamins in the body. While raising hypertension, it will also increase the risk of cardiovascular disease.
Even if there are many reasons why you like coffee, first make it a good partner for a healthy life. Therefore, experts remind that for most people, the total daily intake of caffeine should not exceed 250 mg, which is equivalent to drinking 2-3 cups of coffee.