As a drink that has been passed down for thousands of years, drinking tea often does have many benefits to the human body. According to the investigation and study, drinking three cups of tea every day can give full play to its disease prevention and health care function.
Healthy? The doctor reminds: For both men and women, these three teas advise you to drink less "img _ height ="1170 "img _ width ="1280 "data-src ="//imgq7.q578.com/ef/0326/. But there are endless rumors on the Internet that drinking tea is bad for your health. Is there any scientific basis for this statement? In fact, as long as you learn to drink tea correctly, tea is beneficial to the human body.
1, cancer prevention
Cancer has become one of the biggest threats to human health. Tea contains catechins, especially catechins in green tea, accounting for 15%-20% of tea. Flavonoids such as catechins have certain anticancer effects. Tea also contains certain vitamin C and vitamin E, and it also has an auxiliary anti-cancer effect.
2. Radiation protection
Because tea contains polyphenols, ester polysaccharides, vitamin C and carotene, these nutrients can absorb radioactive strontium together and excrete it in the form of feces. The components in tea can also prevent external radiation damage caused by proton beam, X-ray or γ-ray, and can effectively prevent the harm of radioactive substances to human body.
Healthy? The doctor reminds you to drink less "img _ height =" 862 "img _ width ="1280 "data-src ="//imgq7.q578.com/ef/0326/8483026258d.jpg ... 3. Reduce the risk of cardiovascular diseases.
Drinking tea can effectively reduce blood lipid and cholesterol levels, because tea polyphenols can inhibit the proliferation of arterial smooth muscle cells, and have obvious anticoagulant effect, promote fibrinolysis, prevent the formation of blood spots, and reduce capillary fragility and blood viscosity.
Step 4 quench thirst and relieve summer heat
Because polyphenols in tea, as well as sugars, pectin, amino acids and other components react with saliva, the mouth is moist and produces some coolness. In addition, caffeine in tea can also regulate the body temperature center inside the human body, so as to achieve the purpose of regulating body temperature.
Healthy? The doctor reminds you to drink less "img _ height =" 852 "img _ width ="1280 "data-src ="//imgq7.q578.com/ef/0326/52963db10cbfc658. 1, strong tea
Strong tea contains a lot of excitable substances in the nervous system. If children drink too much strong tea, it will lead to an increase in the excitability of the cerebral cortex, which will make it difficult to fall asleep, often wake up at night and have poor sleep quality. In the long run, it will affect intelligence, attention and memory, which is not conducive to brain development;
Strong tea contains a lot of tannic acid, which will affect the normal digestive function when it enters the digestive tract. Drinking strong tea often may lead to digestive dysfunction and indigestion, which will affect the absorption of nutrients. In the long run, children will be emaciated and malnourished.
Healthy? The doctor reminds you to drink less "img _ height =" 854 "img _ width ="1280 "data-src ="//imgq7.q578.com/ef/0326/3cb31507655. Strong tea can also affect the absorption of vitamins and trace elements in the body, such as vitamin B 1 deficiency or iron absorption. If children always drink strong tea for a long time, it will lead to a large loss of iron, and iron deficiency anemia will occur in the long run.
2, overnight tea
The taste of tea soup became bitter after a night. Because of long-term exposure to the air, it is easy to breed corrupt bacteria, which may lead to diarrhea, dizziness, vomiting and other hazards after drinking. Secondly, overnight tea will produce a lot of free tannic acid, which directly stimulates the gastric mucosa.
Polyphenols in tea will form tea rust after reacting with oxygen in the air, and tea rust contains many harmful substances such as lead, arsenic and mercury, which will damage liver and kidney function and induce inflammation after entering the human body.
Healthy? The doctor reminds you to drink less "img _ height =" 860 "img _ width ="1280 "data-src ="//imgq7.q578.com/ef/0326/bb99c935a04d9a98.jpg "for both men and women. It has a certain effect on the unchangeable overnight tea. Because overnight tea is rich in acid, it can prevent capillary bleeding. If you have stomatitis, glossitis, eczema, bleeding gums and oral infection, you can rinse your mouth with overnight tea.
3. Hot tea
The occurrence of esophageal cancer is related to chronic nitrosamine stimulation, inflammation and trauma, genetic factors and trace elements in drinking water, grain and vegetables. A new discovery shows that drinking hot tea with water temperature over 65℃ will significantly increase the risk of esophageal squamous cell carcinoma.
Gorestan province in northern Iran is one of the regions with the highest incidence of esophageal cancer in the world. The proportion of residents smoking and drinking here is not high, but drinking tea is quite common. The researchers investigated 3 0 0 D5 esophageal cancer patients 7 1 healthy people. These people have the habit of drinking black tea every day, with an average of more than 1 liter per person per day.
Healthy? The doctor reminds: For both men and women, these three teas advise you to drink less "img _ height =" 852 "img _ width ="1280 "data-src ="//imgq7.q578.com/ef/0326/C512bed055. The results show that compared with people who drink tea below 65℃, people who are used to drinking hot tea above 65℃ have twice the risk of esophageal cancer, and if they drink hot tea above 70℃ frequently, the risk of esophageal cancer is even as high as 8 times. Researchers pointed out: people don't have to be skeptical about drinking tea, but should wait for a while after making hot tea.
Myth 1: Strong tea "sobers up"
Some people think that drinking strong tea can "sober up", which is a misunderstanding. Because people drink alcohol, the alcohol in the wine enters the blood through the gastrointestinal tract, first converted into acetaldehyde in the liver, then converted into acetic acid, then decomposed into carbon dioxide and water, and excreted through the kidney.
However, after drinking strong tea, caffeine in tea can quickly play a diuretic role, thus promoting acetaldehyde (a substance that has a great stimulating effect on the kidney) to enter the kidney prematurely and damage the kidney.
Healthy? The doctor reminds you to drink less "img _ height =" 960 "img _ width ="1280 "data-src ="//imgq7.q578.com/ef/0326/aa4f2b304bc9bba.jpg "src = Myth 2:" Tea bag treatment.
Some people think that tea is not only a safe drink, but also a good medicine for treating diseases. As we all know, for some patients, it is not advisable to drink tea, especially strong tea. Caffeine in strong tea can make people excited, insomnia and increase metabolic rate, which is not conducive to rest;
It can also accelerate the heartbeat of patients with hypertension, coronary heart disease and nephropathy. Even arrhythmia and frequent urination will increase the burden on the heart and kidneys. In addition, caffeine can also stimulate gastrointestinal secretion, which is not conducive to the healing of ulcer disease; Tannin in tea has astringent effect, which can slow down intestinal peristalsis and aggravate constipation.
Healthy? The doctor reminds you: These three teas advise you to drink less "img _ height ="1218 "img _ width ="1280 "data-src ="//imgq7.q578.com/ef/0326. Myth 3: Drink tea immediately after a meal.
Tea contains a lot of tannic acid, which can react with iron in food to form new substances that are difficult to dissolve. Over time, it will cause iron deficiency and even induce anemia. The correct way is to drink tea an hour after meals.
Myth 4: Drinking tea during menstruation
Drinking tea during menstruation, especially strong tea, will induce or aggravate menstrual syndrome. Medical experts have found that compared with people who don't drink tea, people who have tea habits are 2.4 times more likely to have menstrual tension, and those who drink more than 4 cups of tea a day are 3 times higher.