0-year-old Mr. Chen has loved drinking tea since he was a child and never leaves tea every day. He is familiar with all kinds of tea knowledge and is very clear about it. He said that drinking tea has many benefits and has health benefits. After drinking it, it is better than that of young people and can even fight cancer.
New tea was launched some time ago. He went to the market to buy a lot of the best Mingqian tea . Every morning, he had to drink a cup on an empty stomach, and after dinner, and even after drinking.
drank like this for a few days, and family found that his face was getting worse and worse , looking pale and bloodless, and looking a little thinner.
Uncle Chen, who has a stubborn personality, feels that he is healthy and will not have any problems and is unwilling to seek medical treatment. Unexpectedly, it became more and more serious later. The stomach began to feel uncomfortable, and the weight was significantly reduced. Then I came to the hospital for examination.
gastroscopy report shows that Uncle Chen suffers from a large area of gastric ulcer , and told him not to drink green tea again in the future, especially new tea. Because new tea contains more polyphenols , as well as alcohols and aldehydes, it is easy to induce stomach disease for people with poor gastrointestinal function.
We often think that drinking tea can keep you healthy, but Mr. Chen in the case drank gastric ulcers. Is the tea really good? How should I drink it?
1. Research found that two to three cups of tea per day reduce the risk of all-cause death by 13%
There have been many researches on tea, and most of them are green tea. A recent study in the Yearbook of Internal Medicine also explored the benefits of black tea.
The study included nearly 500,000 participants in the UK biobank , of which about 85% of the participants drank tea, and about 90% of the people drank black tea , about 29% of the participants drank 2 to 3 cups a day, and 26% drank 4 to 5 cups.
In the follow-up data for up to 11 years, drinking more tea is related to a lower risk of death. Specifically: Drinking 2 to 3 cups of tea per day can reduce the risk of all-cause death by 13%, and this has nothing to do with the participants' ability to metabolize caffeine .
However, the study did not mention how large the capacity of a cup is. You can think that the amount of a cup is about 125~150 ml.
2. Which one is healthier, who drinks tea or boiled water?
First of all, boiling water is to heat and boil tap water. After heating, all the microorganisms and pathogenic bacteria that may exist in the water are killed. is a safe and most suitable drinking water for human needs.
Drinking boiled water can not only help the human body obtain water, but also transport various metabolites to maintain health.
There are many types of water on the market, such as ionic water , weakly alkaline water, hydrogen-rich water, oxygen-rich water , etc. In fact, this is not necessary, because there are very few other nutrients to obtain by drinking water, and it can even be ignored, so choosing boiled water is healthier and economical.
However, Some people say that tap water contains chlorine and there is a risk of cancer. Is this true?
In order to inhibit bacteria, certain chlorine is indeed left in tap water, but it will not cause cancer. Tap water needs to undergo 106 strict water quality monitoring in the country. WHO stipulates that the chlorine in each liter of water shall not exceed 5 mg. Generally, the chlorine content in tap water is less than 1 mg per liter. Therefore, the chlorine contained in tap water cannot reach the toxic dose.
Sometimes, you will find that tap water has scale after boiling. This is mainly . Because The hardness of water is slightly higher , it contains more calcium and magnesium ions, and normal drinking will not cause any problems.
Secondly, what about drinking tea?
Some people think drinking boiled water when you are not thirsty is boring. At this time, Drinking tea is also a good way to hydrate . For example, green tea, white tea , black tea, oolong tea, flower tea, Pu'er tea , etc. are all natural and healthy drinks, and they do not contain fat, sugar, salt, etc. The effect of hydrating and quenching thirst is very good.
In addition, tea water contains rich tea polyphenols , which has strong antioxidant effects and has certain benefits for blood pressure, blood lipid and cardiovascular health.
Generally speaking, boiled water is the safest, hygienic, cost-effective water, and drinking tea is also excellent. There is no only answer to this question, the most important thing is to drink it correctly.
3. You must also know how to avoid drinking tea. Try not to drink 6 kinds of teas. Although drinking tea is good for health, you should also pay attention to avoiding eating. It is best not to drink these kinds of teas to avoid damaging your health:
. Strong tea
Strong tea contains a large amount of tannic acid , and tannic acid is easy to combine with iron into an insoluble substance, which will hinder the body's absorption of iron. Therefore, drinking a lot of strong tea can easily lead to iron loss in the human body, and may also inhibit the body's absorption of calcium in the long run.
, long-term tea
If tea takes too long, the lipid substances and tea polyphenols contained in the tea will automatically oxidize, causing the color of the tea soup to become darker, the taste and fragrance will become worse, reducing the taste value, and also losing the amino acid , vitamin C and other substances contained in the tea, and loses a lot of nutritional value .
In addition, the tea water is stored for too long and is easily polluted by the surrounding environment and may be invaded by bacteria and microorganisms and affect health. It is best not to drink it.
, burnt tea
When making tea, if is overbaked , it will produce burnt flavor. At this time, the nutrients in the tea will be greatly damaged and even contain certain carcinogens. Therefore, burnt tea should not be drunk from the perspective of food safety or nutrition.
, hot tea
When making tea, boiling boiling water is usually used, but do not overly hot when drinking tea, otherwise it will burn the oral and esophageal mucosa and cause ulcers. Over time, it may induce esophageal cancer and oral cancer. WHO has defined drinks above 65°C as a Class 2A carcinogen.
, moldy tea
If the tea leaves are contaminated by Asyptis and Penicillium , they will become moldy. This kind of tea brewed not only has no fragrance, but will also damage human health, leading to diarrhea, dizziness and other discomfort reactions.
, new tea
raw tea has severe green breath, and the ingredients and fresh leaves contain almost the same content. If the elderly drink this tea, it will have a strong irritation to the gastric mucosa, which can easily lead to stomachache ; even if young people drink it, they may experience stomach discomfort, so it is best to drink less.
There are many benefits to drinking tea, but there are also many things to pay attention to when drinking tea. You must drink tea correctly to play a real role.
Reference materials:
[1] "Online of Internal Medicine": Black tea also prolongs life! 500,000 people have been following up for 11 years and found that two cups of tea per day are related to a 13% reduction in the risk of all-cause death, and black and green tea are all good. Singularity.com. 2022-10-04
[2] "Can you insist on drinking 3 liters of boiled water every day make you 10 years younger? Is boiled water really so magical? 》. Ruan Guangfeng Nutritionist .2018-04-11
[3] "[Popular Science Nutrition] Drinking water on a daily basis "What water is the best to drink?"! 》. Clinical Nutrition Network.2022-04-02
[4] "The elderly have suffered severe anemia after drinking strong tea for a long time! Tea experts give the best "tea and water ratio". Life Times. 2021-08-17
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