Tea polyphenols have strong oxidation resistance and physiological activity, and are scavengers of human free radicals. According to the research of relevant departments, the effect of 1 mg tea polyphenols on eliminating excessive free radicals harmful to human body is equivalent to 9 micrograms of superoxide dismutase (SOD), which is much higher than other similar substances. Tea polyphenols can block lipid peroxidation and remove active enzymes. According to the test results of Tomoyo in Ota, Japan, it is confirmed that the anti-aging effect of tea polyphenols is 18 times stronger than that of vitamin E.
2, help to inhibit cardiovascular disease.
Tea polyphenols play an important role in human fat metabolism. The human body has cardiovascular diseases such as high cholesterol and triglycerides, such as fat deposition on the inner wall of blood vessels and atherosclerotic plaques formed after vascular smooth muscle cells proliferate. Tea polyphenols, especially catechins ECG and EGC in tea polyphenols and its oxidation products theaflavins, are helpful to inhibit this mottled proliferation, reduce the formation of fibrinogen that enhances coagulation viscosity, make coagulation clear, and thus inhibit atherosclerosis.
3, help to prevent and fight cancer.
Tea polyphenols can block the synthesis of carcinogens such as ammonium nitrite in the body, which can directly kill cancer cells and improve the immunity of the body. According to relevant data, tea polyphenols (mainly catechins) in tea are beneficial to the prevention and adjuvant treatment of cancers such as gastric cancer and intestinal cancer.
(Attachment): What are the beneficial ingredients in tea?
Tea contains a variety of ingredients, nearly 500 kinds. There are mainly caffeine, theophylline, theobromine, choline, xanthine, flavonoids and glycosides, tea tannins, catechins, terpenoids, phenols, alcohols, aldehydes, acids, esters, aromatic oils, carbohydrates, multivitamins, protein and amino acids. Amino acids include cysteine, methionine, glutamic acid and arginine. Tea also contains minerals such as calcium, phosphorus, iron, fluorine, iodine, manganese, molybdenum, zinc, selenium, copper, germanium and magnesium. These components in tea are beneficial to human body, especially manganese can promote the formation of vitamin C in new tea and improve the anti-cancer effect of tea. They have the same function and are of great significance to the prevention and treatment of human diseases, so there is a saying that "tea is indispensable for a day".
4. It is helpful to prevent and treat radiation injury.
Tea polyphenols and their oxidation products have the ability to absorb the toxicity of radioactive substances strontium 90 and cobalt 60. According to the clinical trials of relevant medical departments, the treatment of mild radiation sickness caused by radiotherapy with tea extract can reach more than 90%. For cytopenia, the effective rate of tea extract is 865438 0.7%; It has a good therapeutic effect on leukopenia caused by radiation.
5, help to inhibit and resist viruses and bacteria
Tea polyphenols have strong convergence, obvious inhibition and killing effects on pathogenic bacteria and viruses, and obvious anti-inflammatory and antidiarrheal effects. Many medical units in China use tea preparation to treat acute and chronic dysentery, amebic dysentery and influenza, and the cure rate is about 90%.
6, contribute to beauty and skin care
Tea polyphenols are water-soluble substances, which can remove greasy face and astringe pores, and have the effects of disinfection, sterilization, anti-aging and reducing the damage of ultraviolet rays in the sun to the skin.
7, help to refresh.
Caffeine in tea can stimulate the central nervous system of human body, enhance the excitement process of cerebral cortex, and has the functions of refreshing the brain, clearing away heart fire and calming the nerves.
8, help diuresis to relieve fatigue
Caffeine in tea can stimulate the kidney, promote the rapid excretion of urine, improve the filtration rate of the kidney and reduce the retention time of harmful substances in the kidney. Caffeine can also eliminate excessive lactic acid in urine, which helps to eliminate fatigue as soon as possible.
9, help reduce blood fat and help digestion.
It is recorded in the Tang Dynasty that the effect of tea is "eating for a long time makes you thin". There is a saying among the ethnic minorities in China's border areas that "tea is indispensable for a day". Because tea helps digestion and reduce fat, in today's fashionable language, it is helpful to "lose weight". This is because caffeine in tea can increase the secretion of gastric juice, help digestion and enhance the ability to decompose fat. The so-called "long-term eating makes people thin" is here.
10, which helps to protect teeth and improve eyesight.
The fluorine content in tea is high, and the fluorine content per 100 g of dry tea is 100 mg ~ 15 mg, of which 80% is water soluble. If everyone drinks 10g tea every day, they can absorb 1mg ~ 1.5mg of water-soluble fluoride. Moreover, tea is an alkaline beverage, which can inhibit the reduction of calcium in the human body, help prevent dental caries, protect teeth and strengthen teeth. According to relevant data, the experiment of "gargling with tea after drinking" among primary school students can reduce the incidence of dental caries by 80%. According to the investigation of relevant medical units, 28.6% cataract patients have the habit of drinking tea; 7 1.4% have no habit of drinking tea. This is because vitamin C and other ingredients in tea can reduce the turbidity of eyes, and drinking tea often has a positive effect on reducing eye diseases, protecting eyes and improving vision.
Green tea is the earliest tea in history. Ancient humans collected wild tea buds and dried tea leaves, which can be regarded as the beginning of green tea processing in a broad sense, at least three thousand years ago. But the real green tea processing began with the invention of steamed green tea in the 8th century, and ended with the invention of fried green tea in12nd century. The processing technology of green tea is relatively mature, which has been used to this day and is constantly improving.
Green tea is the largest tea in China, and its producing areas are distributed in tea-producing provinces, municipalities and autonomous regions. Among them, Zhejiang, Anhui and Jiangxi provinces have the highest output and the best quality, and are the main bases of green tea production in China. In the international market, China green tea accounts for more than 70% of the international trade volume, and its sales areas are all over North Africa and West Africa, as well as more than 50 countries and regions such as France, the United States and Afghanistan. In the international market, the sales of green tea account for more than 1/3 of the total domestic sales. At the same time, green tea is the main raw material for producing scented tea.
Benefits of drinking tea (2) 1, drinking tea can lose weight.
Tea contains catechins, cholesterol ketone, caffeine, inositol, folic acid, pantothenic acid and other components, which have the function of preventing and inhibiting obesity under the comprehensive action. In Japan, I especially like oolong tea in China. Because oolong tea has a strong role in decomposing fat, it can help solve greasy, help digestion and lose weight. Dr. Carobbi, clinical director of St. Anthony's Department of Medicine, confirmed that drinking Pu 'er tea produced in Yunnan often can reduce triglycerides and cholesterol in the human body. French women, especially young women, attach great importance to physical beauty. They call Pu 'er tea "slimming tea".
Drinking tea can prevent tooth decay.
Drinking tea or brushing your teeth with tea can not only eliminate bad breath, but also prevent dental caries. It is reported that Dacheng Zhou, M.D. of Beijing Stomatological Hospital, has been studying the efficacy of tea in preventing dental caries since 1970s, such as drinking tea, gargling with tea soup, brushing teeth, or using toothpaste containing tea, but brushing teeth with tea soup is the best. This is because tea contains fluorine, which has great affinity with calcium in teeth and can become a kind of "neon apatite" which is difficult to dissolve in acid. Just like adding a protective layer to teeth, it improves the ability of teeth to prevent acid and caries. Using tea to prevent caries is one of the ways to protect teeth. Therefore, gargling, brushing teeth and drinking tea with tea soup can be popularized among children. In low fluorine areas, it is recommended to drink ordinary low-grade tea (high-grade tea and famous tea have low fluorine content) to prevent dental caries. Drinking tea soup brewed with10g of tea every day can meet the human body's demand for fluorine. Tea with high fluorine content includes Fujian oolong tea, Yunnan tea, Yunnan black tea, Zhejiang tea, Jiangxi jasmine tea and Guizhou brick tea.
3. Tea can prevent cardiovascular diseases.
Drinking tea is beneficial to cardiovascular diseases such as hypertension. Coronary heart disease has certain preventive and therapeutic effects. Clinical experiments have proved that people who drink three bowls of Tuocha every day for a month have reduced their blood lipid by 13% and cholesterol. Clinical trials were conducted on 80 patients with hypertension. As a result, after 5 days of treatment with green tea, the blood pressure of 30 patients decreased and some people returned to normal. Some people also study the relationship between drinking tea and coronary heart disease, and divide it into three groups: no tea, occasional tea and frequent tea. The results showed that the incidence of coronary heart disease was 3.65438 0% without drinking tea, 2.3% with occasional drinking tea and 65438 0.4% with frequent drinking tea. We can see the effect of drinking tea on preventing coronary heart disease.
Types of tea beneficial to hypertension
4. Tea is a good medicine for intestinal diseases.
Zhang Zhongjing, a medical sage, said, "Tea is very effective in treating purulent blood." Modern medical research has confirmed that tea is a good medicine for treating intestinal diseases. Polyphenols in tea can solidify and precipitate protein. Tea polyphenols combined with single-celled bacteria can coagulate eggs and kill bacteria. Such as harmful cholera bacteria, typhoid bacilli, Escherichia coli and so on. Soak in strong tea soup for a few minutes, and most of them will lose their ability to move. Therefore, Chinese medicine and folk often use strong tea or ground green tea to treat intestinal diseases such as bacillary dysentery and enteritis. The method is that 3 grams of tea leaves and a bowl of water are decocted three times a day; Or three times a day, a cup of strong tea and 20 ml of vinegar; You can also take tea 15g and shepherd's purse flower 15g, decocted and taken three times a day before meals. Secondly, when making tea with water, if the drinking water is not clean, tea leaves can adsorb impurities in the water and precipitate, which has the function of purification and disinfection and is good for preventing intestinal infectious diseases.
5, the efficacy of ancient books
According to the dictionary of traditional Chinese medicine, jasmine has the effect of "regulating qi and relieving depression, removing filth and harmonizing the middle energizer", and has a good anti-inflammatory and detoxicating effect on dysentery, abdominal pain, conjunctivitis and ulcers. Regular drinking of jasmine has the effects of clearing liver-fire, improving eyesight, promoting fluid production, quenching thirst, eliminating phlegm and stopping dysentery, dredging convenient water, expelling wind and relieving exterior syndrome, treating fistula and strengthening teeth, invigorating qi and lowering blood pressure, strengthening heart and preventing dental caries, radiation injury, cancer and anti-aging, thus prolonging life and keeping people's physical and mental health.
Note: Drinking strong tea often will cause calcium loss.
Caffeine in strong tea will increase calcium excretion, so friends who like to drink strong tea should pay attention to calcium supplementation.