Smoking, drinking and drinking tea, which one is the most harmful to the body? Let's compare now

Do you like drinking tea? Tea can quench thirst, delay aging, protect eyes and teeth, and even reduce the risk of death.

And different teas have different health effects. A study involving 500,000 people found that drinking black tea can reduce the risk of death.

1. 2-3 cups of tea a day may reduce the risk of death

The research came from researchers from the National Institutes of Health. They followed up nearly 500,000 people. After statistics on the frequency of tea drinking, they found that 85% of them often drink tea, and 29% of them drink 2-3 cups of tea a day. %, 26% drink 4-5 cups of tea per day, and 12% drink 6-7 cups of tea per day.

After more than 11 years of follow-up, nearly 30,000 follow-up patients died.

After analysis by researchers, researchers found that drinking black tea had a significant effect on reducing the risk of death compared with people who did not drink black tea .

Among them, even drinking less than 1 cup a day was associated with a 5% lower risk of all-cause mortality. When drinking more than 2 cups of black tea per day, the risk of death can be reduced by 9-13%, with the most significant reduction in the risk of all-cause death drinking 2-3 cups per day .

In addition, studies have found the relationship between black tea and other diseases, such as reducing the risk of cancer, all-cause cardiovascular disease, stroke, respiratory disease and other diseases.

1. Reduce the risk of cardiovascular death

A study by the team of Academician Gu Dongfeng found that drinking tea regularly can not only reduce the risk of all-cause death, but also prevent the occurrence of cardiovascular and cerebrovascular events. Among them, people who insist on drinking tea for a long time and those who are accustomed to drinking green tea benefit more obviously.

2. Reduce the risk of diabetes

A study published in the "American Journal of Clinical Nutrition" by Professor Li Liming and others found that for normal people, drinking green tea every day can reduce the risk of type 2 diabetes.

In addition, people who drank tea every day had an 8%, 10%, and 12% lower risk of developing type 2 diabetes, all-cause mortality, and microvascular complications, respectively, compared with those who never drank tea.

3. Reduce the risk of stroke

A follow-up study involving more than 430,000 people found a stepwise decrease in the risk of stroke with occasional, weekly, and daily tea consumption compared with non-drinkers.

Among them, those who drank tea every day were associated with an 8% lower risk of stroke compared with those who never drank tea.

Second, smoking, drinking, drinking tea, which is more harmful?

There is no distinction between tobacco, alcohol and tea. Some people say that drinking tea can prevent cancer and reduce the risk of death. Others say that drinking tea can cause cancer. So, which of tobacco, alcohol and tea is more harmful?

• smokes

Why is smoking harmful to health? Mainly because tobacco contains at least 69 kinds of carcinogens, which are a serious threat to health.

According to data released by the World Health Organization, 6 million people worldwide die every year due to smoking, of which China accounts for about 1/6. Smoking not only causes respiratory diseases such as bronchial asthma, tuberculosis, and chronic obstructive pulmonary disease, but also cardiovascular and cerebrovascular diseases such as stroke, coronary heart disease, and atherosclerosis.

In addition, the study found that the longer the smoking age and the more smoking, the higher the risk of cancer . The known smoking-related cancers include lung cancer, nasopharyngeal cancer, liver cancer, oral cancer, esophageal cancer, breast cancer, etc. .

Quitting smoking is good for your body in both the short and long term. After quitting smoking in the short term, heart rate and blood pressure will drop, carbon monoxide levels in the blood will drop to normal levels, blood circulation will improve, and lung function will return to normal.

Long-term smoking cessation reduces the risk of coronary heart disease, as well as the risk of lung cancer, oral cancer, breast cancer, nasopharyngeal cancer and other cancers.

• drink wine

Alcohol has been classified as a carcinogen by the World Health Organization, and data shows that in 2020, about 740,000 cases of cancer worldwide are caused by drinking.

Studies have pointed out that after ethanol enters the body, it will be converted into acetaldehyde, and acetaldehyde can cause DNA mutations or chromosomal mutations. In addition, acetaldehyde induces normal cell death in the body, increasing the risk of cancer .

For Chinese who like to drink alcohol, the risk of cancer caused by drinking is even greater.

The study found that the alcohol clearance rate of Chinese people is generally lower than that of Europeans and Africans. The mutation of the acetaldehyde dehydrogenase 2 gene unique to East Asians can cause flushing after drinking and cause poor alcohol metabolism, eventually causing acetaldehyde poisoning, and the risk of cancer is higher.

Therefore, when the body has the following symptoms, it is a reminder: it is time to quit drinking!

• drink tea

Can drinking tea cause cancer? It turned out that researchers from Peking University Medical Department once conducted a study and found that compared with people who drank tea less than once a week, people who brewed more than 4g of tea a day had an overall increased risk of cancer by 26%, including lung cancer. and gastric cancer risk increased by 62% and 29%, respectively.

After ruling out some factors, the researchers believe that the increased risk of stomach cancer may be related to the caffeine contained in tea.

In addition, the water temperature of the tea is too high, and it is also one of the reasons why it is easy to burn the digestive tract when drinking it hot.

However, it should be noted that these kinds of tea should be drunk less, otherwise it will easily hurt the body:

1. Strong tea

If the tea is brewed too thickly, the polyphenols in the tea will combine with iron ions to form precipitates and inhibit the absorption of iron. And strong tea contains more caffeine, theophylline and other substances, drinking too much is easy to nausea, insomnia, headache.

In addition, some studies have found that drinking too much tea can damage the bones.

2. Tea that has been steeped for too long

If the tea is steeped for too long, not only the taste value and nutritional value will be reduced, but also it will be easily contaminated and breed a large number of bacteria.

3. Too hot tea

Hot drinks above 65°C are classified as class 2A carcinogens. Often drinking too hot tea can easily damage the oral cavity and esophageal mucosa, causing repeated ulcers and increasing the risk of cancer.

4. Moldy tea

Moldy tea is contaminated by microorganisms such as Penicillium and Aspergillus. Not only does it lose the tea aroma, but it also has a musty smell. Drinking it will cause dizziness, diarrhea, and even organ necrosis in severe cases.

In fact, from the current mainstream point of view, tea is still very beneficial to the human body, provided that we learn to drink it correctly.

References

[1] "How good is the health of people who drink tea every day? Follow-up study of 500,000 people: blood sugar and blood vessels are protected". Life Times. 2021-04-17

[2] "Quitting Smoking Is Difficult? 3 reasons to help you quit smoking successfully! 》.Health Times. 2021-05-27

[3] "The elderly have severe anemia after drinking strong tea for a long time! Tea experts give the best "tea water ratio"". Life Times. 2021-08-17

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