Some time ago, Lao Zhao had nothing to drink a cup of tea, sat in the park and watched other old people play chess, and drank a few mouthfuls from time to time to replenish his body. However, an old man's words instantly made Lao Zhao pour out the remaining tea in the cup.
"You don't drink water all day. Drinking tea as water is a chronic suicide, which easily leads to dehydration and even constipation, and calcium and iron are poorly absorbed. "
"Impossible? I have been drinking tea all my life, and there is no problem. "
Therefore, drinking tea as water is a chronic suicide. Is there any scientific basis for this sentence?
As we all know, the operation of all organs in our body is closely related to water. However, if drinking tea as water is a chronic suicide, it is debatable. Although it has long been thought that caffeine contained in tea has diuretic effect and may lead to dehydration, many studies have not fully supported this view. In fact, the data show that taking more than 180mg of caffeine every day, about two cups of coffee, may increase the amount of urination in a short time, but it may not necessarily cause dehydration.
In addition, the content of caffeine in tea depends not only on the composition of tea, but also on the growth and reproduction of microorganisms in tea. Generally speaking, 500ml of black tea contains 45- 100mg of caffeine, and 500ml of green tea contains 40-90mg. That is to say, we need to drink nearly 1500ml of tea every day to exceed 180mg. Even if it exceeds, we only have an increase in urine volume, not a chronic suicide.
In addition to dehydration, there are even rumors that taking tea as water for a long time will cause constipation, reduce the absorption of calcium and affect the absorption of iron. First of all, constipation caused by drinking tea was caused by a study 35 years ago, that is, excessive theophylline would lead to decreased renal tubular reabsorption, which led to constipation. But today, the scientific community has not been recognized. However, drinking tea will reduce the absorption of calcium and iron. At present, the only paper research shows that no matter what type of tea normal and healthy adults drink, it will not affect the absorption of calcium and iron.
There are many people who think that many drinks in real life are not included in the daily water consumption, such as honey lemonade, milk, soybean milk, coffee, tea and so on. Regarding whether other drinks other than water are included in the daily water consumption, the first Mayo clinic in the world redefines it as "8 glasses of water a day, and all liquid intake in a day, including soup, milk, alcohol, etc."
Tea, as a drink we often drink, will not do harm to our health if we drink it as water for a long time. In fact, compared with drinking tea for a long time, the following three drinks are the most harmful to health.
1, sugary drinks
Carbonated drinks are sold in supermarkets and convenience stores all over the world. Adults and children like to drink it because it is refreshing and tastes good in hot weather or days with a lot of exercise. However, sugary drinks contain a lot of sugar. Take carbonated drinks as an example, the sugar content of each can of carbonated drinks is about 55 grams, that is, 14 to 15 cubes of sugar. But in fact, diet soda may also be harmful to our health. This is because soda water generally contains carcinogens such as artificial caramel pigment.
2. Energy drinks
In many advertisements, it is always declared that "if you are tired or thirsty, drink so-and-so energy drinks to relieve our fatigue instantly." So many people always take energy drinks instead of water after work and take pains to drink them. In fact, it is ok to drink an energy drink occasionally after work or after exercise to relieve fatigue, but never drink energy drinks as water, otherwise it will easily endanger health, such as heart attack, drug addiction, cognitive impairment and so on.
3. Alcoholic beverages
Alcoholic beverages such as sake, wine and beer are also widely sold and eaten in many countries in the world. According to the National Cancer Institute, excessive drinking can lead to various types of head and neck cancer, esophageal cancer, liver cancer, breast cancer and colon cancer. If you drink too much alcohol for a long time, cancer cells are more likely to occur. Especially for people who often suffer from alcoholism and liver disease, drinking alcohol will lead to a higher risk of cancer.
As mentioned above, drinking tea for a long time will not cause health hazards. But if you don't pay attention, there are still potential health hazards. Therefore, for friends who drink tea for a long time, it is more conducive to health to do 2 points in the process of drinking tea.
1. Buy tea from regular channels.
Since ancient times, China's tea culture has been extensive and profound. Now, tea, as a way of keeping in good health, may not bring us any harm, even if it can't bring us more health benefits. And the biggest key is to choose tea from regular sources to avoid some inferior tea with unknown ingredients, which will cause harm to the body.
2. Don't drink hot tea
As we all know, in our country, the traditional way of making tea is to brew it with high-temperature boiling water. So many people also like to take a sip of tea while it is not cold. You know, drinking high-temperature tea often can easily cause damage to esophageal mucosa and even risk esophageal cancer. In addition, if you are really worried that caffeine in tea will do harm to your health, you can also use cold soaking, which can reduce caffeine intake to some extent.
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