Because green tea is baked in quick fire, it basically maintains the original three functional nutrients of tea, namely tea polyphenols, theanine and tea polysaccharides. As we all know, tea polyphenols is an excellent natural antioxidant, which can eliminate the damage of "free radicals" (one of the harmful substances produced in the process of human metabolism) to human tissues and organs. Theanine is a natural "sedative". The ancients in China said that drinking green tea can "calm down" (make people calm), and the reason is related to the role of theanine in tea. "Theanine capsule" has been developed and marketed abroad as a new type of health food for treating insomnia and ADHD in children. In addition, theanine is an important "flavor substance" that determines the taste of green tea. Tea polysaccharide has a good hypoglycemic effect, which can reduce the "insulin resistance" in human body and increase the utilization of glucose by peripheral cells, thus preventing the occurrence of diabetes. All of the above are based on a lot of scientific literature.
Once fermented, tea becomes "black tea". Its chemical composition is quite different from that of green tea. According to tea researchers at home and abroad, the main substance "tea polyphenols" in green tea will be transformed into "theaflavins" (the oxidation products of polyphenols in tea) after high-temperature fermentation, and the content of theaflavins in black tea is an important substance that determines the color of tea soup. Another substance produced after tea fermentation is "tea jade red essence", which accounts for about 20% of the dry weight of black tea. Tea jade red essence largely determines the consistency and taste of black tea. As for why the tea soup of black tea is sweet, while green tea is not only sweet, but also astringent, the researchers explained that the astringency of green tea mainly comes from "tea tannin", and tannin is astringent. After natural fermentation of fresh tea leaves, tea tannins and other components are immediately transformed into chemicals such as "tea jade red essence" and "dihydrochalcone". It is known that dihydrochalcone is a natural sweet substance, which is the main reason why black tea is sweet but green tea is not (because there is no dihydrochalcone in green tea).
According to a large number of reports from scholars at home and abroad, the rich "theaflavin" in black tea is a powerful hypolipidemic substance, which can prevent the formation of lipid deposition (atherosclerosis) in blood vessels, thus preventing coronary heart disease or stroke. Therefore, drinking black tea regularly is good for preventing cardiovascular accidents.
But from the pharmacological point of view, green tea has more health care function. According to the research of western researchers, green tea has at least the following 10 pharmacological effects: ① antibacterial and antiviral. ② Prevention of dental caries and elimination of halitosis. ③ Reduce blood lipid and blood pressure. (4) Anti-cancer (especially the prevention of digestive tract tumors). ⑤ Radiation resistance. ⑥ Reduce blood sugar and prevent diabetes. ⑦ Anti-aging (green tea can promote a large number of probiotics such as Bifidobacterium in the intestine, and Bifidobacterium is an internationally recognized "longevity factor"). ⑧ Anti-free radicals (anti-oxidative damage) and activate the function of human immune system. Pet-name ruby diuretic. Attending anti-myocardial ischemia. In a word, green tea is better than black tea in disease prevention.
Question 2: What's the difference between black tea and green tea? Which one to drink? Black tea is a kind of fully fermented tea, which is refined through a series of technological processes such as withering, rolling, fermentation and drying. Tea withering is an important process in the primary production of black tea. Black tea was originally called "black tea" when it was made, and it was named because the tea soup and leaf background after dry tea were red. The main varieties of black tea in China are Rizhao Black Tea, Qi Hong, Zhaoping Red, Huohong, Dianhong, Yue Hong, Quancheng Red and Quancheng Green.
Black tea has the functions of gastrointestinal digestion, stimulating appetite, diuresis, eliminating edema and enhancing heart function.
Green tea mainly refers to a drink made from new leaves or buds of tea trees without fermentation, after fixation, shaping and drying. The color of the finished product and the brewed tea soup retain the green style of new tea. Drinking green tea regularly can prevent cancer, reduce fat and lose weight, and also reduce the harm of nicotine to smokers.
Question 3: Which is better for your health, black tea or green tea? Black tea is made by fermentation and baking. During the fermentation process, tea leaves turn into red oxides and become black tea under the action of oxidase. Black tea is mild in nature and mellow in taste. Besides containing a variety of water-soluble vitamins, it is also rich in trace element sea. After brewing, 70% potassium can be dissolved in tea. Potassium can enhance blood circulation in the heart and reduce calcium consumption in the body. Because manganese contained in black tea is one of the indispensable elements of bone structure, drinking black tea often is also beneficial to bone strength.
In recent years, it has been reported abroad that drinking black tea often has the effect of preventing and treating influenza, stroke and skin cancer. Professor Tadao Shimamura of Showa University in Japan found through research that experts believe that in order to prevent influenza virus from entering the oral cavity, just gargling with black tea or drinking more black tea at ordinary times can effectively kill the virus and prevent influenza from invading the human body.
Studies have shown that black tea contains a flavonoid, which acts like an oxidant and can prevent stroke and heart disease. Dutch scientists observe whether black tea can prevent stroke. The researchers experimented with 552 men aged 50-60 and divided them into two groups. One group drinks less than 2.5 cups of black tea every day on average, while the other group drinks 5 cups of black tea every day. The results show that the more flavonoids are ingested from black tea, the smaller the risk of stroke. And people who drink as many as five cups of black tea a day have a lower risk of wind disease than those who don't drink black tea. A recent study in the United States shows that people who drink a cup of black tea every day have a lower risk of heart disease than those who don't.
Australian scientists believe that drinking black tea can effectively reduce people's risk of skin cancer. When exposed to excessive ultraviolet rays, the researchers proved that mice drinking black tea were less likely to develop cancer or skin damage than mice drinking water alone, and found that the incidence of skin cancer was much lower than that of mice drinking green tea. This is the first time to prove that black tea has a stronger anticancer effect than green tea in preventing skin cancer.
(Excerpted from Health News)
There is another sentence ... because it is not cold after fermentation, it nourishes the stomach, because sick people can drink black tea instead of green tea.
As a healthy drink, green tea not only has the functions of refreshing, eliminating fatigue and resisting bacteria, but also has a high health care effect.
First, heatstroke prevention and cooling. After drinking hot tea for 9 minutes, the skin temperature drops 1℃-2℃, which makes people feel cool and dry.
Second, skin care and beauty. Vitamin C contained in tea can prevent skin aging and remove skin impurities.
Third, antibacterial sterilization. Tea polyphenols are beneficial components in green tea, which help to protect the digestive tract and prevent the occurrence of digestive tract tumors. At the same time, gargling with green tea can prevent gum bleeding, kill oral bacteria and keep your mouth clean.
Fourth, vision care. Vitamins A, B 1 and B2 contained in tea have health-care effects on the visual function of eyes.
Five, prevent and improve iron deficiency anemia. The iron content in tea is 18 times higher than that in hawthorn and 29*8 times higher than that in grape.
(Excerpted from Health News)
In addition, green tea can also prevent radiation. Because there are many ingredients in green tea that can absorb radiation (somewhat mysterious), it is suitable for people who often work in front of computers to drink more green tea. Green tea can also fight cancer ~
Question 4: Who can tell me the difference between black tea and green tea? Does it taste different? Green tea is a good anti-aging beauty health care product, black tea is not, but green tea is sometimes bad, for example, drinking it on an empty stomach will have a bad effect on the stomach.
Question 5: Which is the best, white tea, green tea or black tea? White tea contains more amino acids.
Anti-radiation effect of green tea
Black tea beauty
Question 6: Which is better for girls, black tea or green tea? Both kinds of tea are better, which is good for health. It depends on one's physique and physical needs. First, the efficacy of black tea: polyphenols in black tea (also found in green tea) have the activity of inhibiting the destruction of bone cells. Drinking black tea can make people's bones strong. In order to prevent and treat the common osteoporosis in women, it is suggested to drink a small cup of black tea every day for several years. The effect is obvious. If lemon is added to black tea, the bones will be strengthened and the effect will be stronger. Various fruits can also be added to black tea, which can play a synergistic role.
Second, the slimming of green tea is more peaceful and effective: it is rich in aromatic compounds, which can dissolve fat, remove turbidity and greasy, and prevent the accumulation of fat in the body, while vitamins B 1, C and caffeine can promote the secretion of gastric juice, help digestion, reduce fat, and green tea can increase the metabolism of body fluids, nutrients and calories, and strengthen microvascular circulation.
These are the effects of black tea and green tea. You can choose the tea that suits you according to your own situation.
Question 7: What's the difference between green tea and black tea? What are the benefits? Which is better? Black tea can help digestion, stimulate appetite, induce diuresis, eliminate edema and strengthen heart function. Disease prevention: black tea has strong antibacterial ability. Gargling with black tea can prevent colds caused by viral diseases, prevent tooth decay and food poisoning, and reduce blood sugar and hypertension. American studies have found that gargling with black tea can prevent tooth decay * help digestion * eliminate edema * reduce blood sugar and hypertension * eliminate bad breath * prevent tooth decay, improve vascular function and contribute to health. It may not be news that drinking black tea can help prevent fatal diseases such as cardiovascular disease, stroke and cancer, but a recent study finally found that black tea can improve the vascular function of human body and is obviously beneficial to health. Black tea is a very common drink all over the world. Studies have also found that drinking black tea can help alleviate the situation of coronary artery disease and reduce the chances of stroke and some cancers. But until recently, a new study discovered how black tea plays a role in our bodies. The study followed 50 patients with heart disease. They drank four cups of black tea and boiled water every day for a month. The results show that the vascular function is obviously improved, which is closely related to endothelial cells that control blood flow and prevent thrombosis. However, doctors also pointed out that this does not mean that black tea can replace medicine. According to past research, a diet with high flavonoid content such as grapes, apples, onions and black tea can help prevent stroke and heart disease. Of course, the lifestyle should also be changed accordingly, including quitting smoking, controlling weight, drinking moderately, eating more fruits and vegetables and low-fat food, and so on. Researchers say that drinking black tea may have limited help to personal health, but overall, its impact can not be ignored.
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Question 8: Which is better, green tea or black tea? More suitable for women? My friend will be happy to answer your questions. Drinking green tea is better than drinking black tea in terms of getting nutrition from drinking tea. Green tea contains more vitamin C than black tea. 100g of high-grade green tea often contains C300-600 mg of vitamin C. Drinking 2-3 cups of this green tea every day can basically meet the human body's demand for vitamin C. However, after black tea is fermented, vitamin C is destroyed more. Vitamin B 1 and B2 in green tea are generally 1-2 times higher than those in black tea. In addition, the content of polyphenols with vitamin P activity in green tea is higher than that in black tea, so green tea is more effective than black tea in bacteriostasis, anti-aging, prevention and treatment of arteriosclerosis, inhibition of cancer mutation, prevention and treatment of radiation injury, reduction of cholesterol and blood lipid, and prevention of dental caries in children. Seasonally speaking, green tea should be drunk in summer, because it is non-fermented, with clear soup color, green leaves, high aroma, mellow taste and natural color, fragrance and taste. Vitamin c and tea polyphenols are high in content. Has the effects of clearing away heat, relieving summer heat, detoxicating, tranquilizing, improving eyesight, promoting fluid production and quenching thirst. Drinking in summer gives people a green and cool feeling. If you add a few chrysanthemums, honeysuckle or a few drops of lemon juice to tea, it can cool off the heat. Suitable for drinking black tea in winter. Black tea is a kind of fermented tea. After special processing of black tea, it has formed unique quality characteristics of color, fragrance and taste. Black tea is rich in caffeine, refreshing and diuretic, which can help digestion of stomach and intestines, promote appetite, eliminate edema, strengthen myocardium and prevent skin cancer caused by radiation. Black tea has little effect, and it is mild. Drinking milk with sugar in winter can nourish the stomach, and in summer it can be made into iced tea with different flavors. In short, drinking tea is good for physical and mental health. Black tea is better for women. On May 3, 2002, the American Medical Association published a survey of 497 men and 540 women for more than 65,438+00 years. It has been pointed out that people who drink black tea have strong bones, and polyphenols in black tea (also found in green tea) have the activity of inhibiting substances that destroy bone cells. The contents of polyphenols in various foods are as follows: black tea-65,438+07.4, green tea. I hope my answer can help you.
Question 9: Which is better, iced black tea or green tea? More flavor? . The anti-aging effect of green tea on human body is mainly reflected in the coordination of several effective chemical components and various vitamins, especially tea polyphenols, caffeine, vitamin C, aromatic substances, lipopolysaccharide and so on. , can enhance human myocardial activity and vascular elasticity, inhibit arteriosclerosis, reduce the incidence of hypertension and coronary heart disease, enhance immunity, thus anti-aging and longevity. Medical research shows that tea polyphenols can not only reduce the contents of cholesterol and triglycerides in blood, but also enhance the toughness and elasticity of microvessels and reduce blood lipids, which is extremely useful for preventing and treating common diseases of middle-aged and elderly people such as hypertension and cardiovascular diseases. Tea contains selenium, and it is organic selenium, which is more easily absorbed by people than selenium in grain and oil. Dr Paixiwat believes that adding selenium to food, combined with vitamin C and vitamin E, can prolong people's life, and tea is rich in these strange elements that are beneficial to life. Drinking black tea has many benefits. Black tea is made by fermentation and baking. During the fermentation process, tea leaves turn into red oxides and become black tea under the action of oxidase. Black tea is mild in nature and mellow in taste. Besides containing a variety of water-soluble vitamins, it is also rich in trace element potassium. When brewing, 70% potassium can be dissolved in tea. Potassium can enhance blood circulation in the heart and reduce calcium consumption in the body. Because manganese contained in black tea is one of the indispensable elements of bone structure, drinking black tea often is also beneficial to bone strength. According to foreign reports, drinking black tea often has the effect of preventing and treating influenza, stroke and skin cancer. Studies have shown that black tea contains flavonoids, which are similar to antioxidants and can prevent stroke and heart disease. A recent study in the United States shows that people who drink a cup of black tea every day have a lower risk of heart disease than those who don't drink tea.
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Question 10: What's the difference between green tea and black tea? Do women drink green tea or black tea in daily life? Green tea is not fermented tea, and black tea is fermented tea. The nutritional content of green tea is higher than other kinds, but the stomach is big and the stomach is not good. People on an empty stomach can't drink green tea. And black tea belongs to warm tea, not * * * stomach, so there is no such taboo. It is good for women with good stomachs to drink green tea. After all, it is better to drink black tea, with high nutrition and good health care. The stomach is not good, safety first, or drink black tea.
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