Coffee knowledge: caffeine FAQ to understand the effects of caffeine on the human body

Q: drinking coffee in the evening can lead to insomnia?

A: in fact, this is a common misinterpretation of the refreshing effect of caffeine. Although caffeine has a good pick-me-up and excitement-boosting effect, ordinary coffee won't cause insomnia even before going to bed. Most of the so-called insomnia is caused by the psychological effect of people and the exciting effect of coffee.

Q: can long-term caffeine consumption be addictive?

A: some people are addicted to tea or coffee. In fact, this "addiction" is not drug addiction, like surfing the Internet, playing video games, playing ball, watching TV, and so on. Some people may have mild headaches, anxiety, uneasiness and other feelings after suddenly stopping drinking. But as long as it is changed to gradually stop drinking within a few days, this discomfort can be completely avoided. So caffeine is not addictive.

Q: caffeine can easily cause osteoporosis?

Answer: after drinking caffeine, the excretion of urinary calcium can be slightly increased temporarily, so it is speculated whether it will cause osteoporosis. In fact, as long as you eat enough calcium every day, these urine calcium will not cause osteoporosis. The important thing is that the daily intake of calcium should be adequate. At present, it is believed that the human body, especially in adolescence, has sufficient calcium and vitamin D, as well as weight-bearing physical activity, which is an important guarantee of strong bones.

Q: caffeine can cause dehydration?

A: people speculate that caffeine is diuretic. In fact, the diuretic effect of caffeine is very slight, and the amount of urination depends on the amount of water consumed, drinking caffeinated drinks will never cause dehydration.

Q: can caffeine cause cancer?

A: after in-depth research by scientists such as the American Cancer Society, no evidence has been found that caffeine is related to cancer. Instead, studies have shown that caffeine has a certain inhibitory effect on colorectal cancer, skin cancer and so on.

Q: pregnant women are not allowed to drink caffeinated drinks?

A: organizations such as the American Academy of Obstetrics and Gynecology do recommend that pregnant women consume the equivalent of one or two cups of coffee a day. However, caffeine has little or no effect on conception, and it is not a risk factor for infertility. As long as drinking a moderate amount, it does not increase the risk factors of spontaneous abortion.

Q: coffee tastes bitter because it contains caffeine?

A: it's not quite right. It is true that caffeine tastes bitter, but the bitter taste of caffeine is not the main component of the bitter taste of coffee. The bitter taste of coffee is due to the carbonization reaction of coffee beans after being red enveloped, which carbonizes the cellulose and produces bitterness.

Q: does caffeine cause hyperactivity in children?

A: although children metabolize caffeine faster than adults, children are not more sensitive than adults. The above 300 mg is an adult dose and children should be appropriately reduced according to their weight. As long as it is not excessive, it will not cause hyperactivity.

All in all, eating caffeinated drinks, the key lies in the amount of drinking, if the right amount in about 300 milligrams a day, that is, less than 5 cups, there is no adverse effect on health.

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