Brief introduction of oolong tea
Green tea and oolong tea are produced by the same kind of tea tree. The biggest difference is whether it has been fermented or not. Because the catechins in tea will combine with each other with the increase of fermentation temperature, the color of tea will become darker, but the astringency of tea will also decrease. The component formed by catechin combination is the polyphenol of oolong tea. Antioxidant polyphenols and catechins can affect the activation of various enzymes in our body. About half of catechins in tea will be converted into polyphenols in oolong tea. Therefore, under the dual effects of catechins and oolong tea polyphenols, oolong tea shows various functions that green tea does not have.
Although the West has always been skeptical about the "slimming effect of tea", medical researchers in China have recently declared that oolong tea does have wonderful effects such as decomposing fat, losing weight and bodybuilding. Guo Xirong, winner of Soong Ching Ling Pediatric Medicine Award, believes that oolong tea contains more tea enzymes, which will effectively reduce subcutaneous fat.
[Edit this paragraph] The origin of the name of oolong tea
Oolong tea, also known as green tea and semi-fermented tea, is named after its founder. Its most famous is the real estate in Fujian and Guangdong. Among them, there are only a handful of Wuyi rock tea in Fujian. Oolong tea is a unique kind of tea in China. Oolong tea has some legends. According to Fujian Tea and the folklore of Fujian Tea, during the Yongzheng period of the Qing Dynasty, there was a tea farmer and an expert hunter in Nanyan Village, Xiping Township, Anxi County, Fujian Province. Because he is black and strong, the villagers call him "Oolong". One spring, Oolong hung a tea basket around his waist and picked tea with a shotgun on his back until noon. Oolong raised his gun and shot, but the injured mountain deer desperately fled to the mountains. Oolong followed closely and finally caught the prey. When it was time to carry the mountain deer home, Oolong and his family were so busy slaughtering and tasting game that they completely forgot about making tea. The next morning, the whole family was busy frying the "tea green" collected yesterday. Unexpectedly, the fresh leaves that have been left overnight have been inlaid with red edges, emitting a fragrance. Tea leaves are soaked out, and the taste is particularly strong, without the bitter taste of the past. After careful consideration and repeated experiments, after withering, shaking, semi-fermentation, baking and other processes. Finally, a new tea product with good quality-oolong tea was made. Anxi has therefore become the hometown of oolong tea.
[Edit this paragraph] Method of making oolong tea
Oolong tea combines the production methods of green tea and black tea, and its quality is between green tea and black tea. It has the rich fragrance of black tea and the fragrance of green tea, and has the reputation of "green leaves with red edges". After tasting, the teeth and cheeks remain fragrant, and the aftertaste is sweet and fresh. The pharmacological effects of oolong tea are outstanding in decomposing fat, losing weight, bodybuilding and so on. It is called "beauty tea" and "bodybuilding tea" in Japan.
To form the excellent quality of oolong tea, the fresh leaves of excellent varieties of tea trees are selected as raw materials, and the picking standards are strictly controlled; Secondly, it is an extremely fine production process. The production process includes air drying, shaking, deactivating enzymes, rolling and baking. Oolong tea can be divided into three subcategories: beating green, shaking green and hand-made green because of different ways of making green. According to different producing areas, business habits are divided into the following sub-categories: northern Fujian oolong, southern Fujian oolong, Guangdong oolong and Taiwan Province oolong. Oolong tea is a unique tea in China, mainly produced in northern Fujian, southern Fujian, Guangdong and Taiwan Province provinces. In recent years, Sichuan, Hunan and other provinces have also produced a small amount.
Oolong tea evolved from Gongchalong Formation and Fengbing in Song Dynasty and was created around 1725 (Yongzheng period of Qing Dynasty). According to Fujian's "Anxi County Records", "Anxi people first invented oolong tea in the third year of Qing Yongzheng, and then it was introduced to northern Fujian and Taiwan Province Province." According to historical research, there were tea shops in Fuzhou in 1862, and oolong tea in Taiwan Province province was exported in 1866. At present, oolong tea is mainly exported to Japan, Southeast Asia, Hong Kong and Macao except Guangdong and Fujian provinces.
[Edit this paragraph] Rare varieties of oolong tea
Oolong tea, as a representative of China tea, is a semi-fermented tea with transparent amber tea juice. But in fact, oolong tea is just a general term, and it can be subdivided into many different kinds of tea. For example: Narcissus, Bai Mudan, Huang Dan (Huang Jingui), Benshan, Eriocheir sinensis, Wuyi Rock Tea, Frozen Top Oolong, Narcissus, Cinnamon, Lan Qi, Phoenix Single fir, Phoenix Narcissus, Lingtou Single fir, Color Species, Tieguanyin suitable for seafood, etc. There are many kinds, and the rare ones are as follows:
1. Wuyi rock tea: produced in Wuyishan, Fujian. Wuyi rock tea is plump and uniform in appearance, compact and curly, smooth in color and frog-shaped in leaves. The colors are green, sandy green and dense yellow, with vermilion or red spots at the bottom and edge of the leaves and light green at the center. Drinking this kind of tea has a strong aroma, mellow leaves, fresh and sweet taste, and a special "rock rhyme". Dahongpao is the best quality of Wuyi rock tea.
2. Fenghuang Danzong: produced in Camellia District, Wu Yong, fenghuang town, Chaozhou, Guangdong. The shape of tea is strong and curly, and the leaves are yellowish with green. The Yan Huang color of the soup is green, and its fragrance is long. After repeated brewing, the lingering fragrance is particularly sweet.
3. Oolong tea in Taiwan Province Province: It is produced in Taiwan Province Province, China, with curly strips and copper brown color. The tea soup is orange-red, pure in taste and rich in fruit fragrance. After brewing, the leaves are red at the bottom and green at the abdomen. Among them, the frozen top oolong tea (commonly known as frozen top tea) in Nantou County is extremely famous and most valuable.
4. Tieguanyin: produced in Anxi, southern Fujian. "Tieguanyin" is not only the name of tea, but also the name of tea varieties. This kind of tea is compact in shape, some like scales, and some like dragonfly heads. Because caffeine evaporates with water, a layer of frost is formed on the surface, which is called "sand green frost". This tea tastes strange when it is brewed. Sipping in hot water, the aroma is overflowing, and the bottom of the throat is sweet, which is called seven bubbles and more fragrant.
5. Oriental Ren Mei: produced in Xiamen.
6. Phoenix Narcissus: It is a strip oolong tea produced in Fenghuang Township, Chao 'an, Guangdong Province. It is divided into three grades: Dan Cong, Bobie and Narcissus. It has natural floral fragrance, honey rhyme, strong taste, alcohol, refreshing and sweet taste, and is resistant to brewing. Mainly sold to Guangdong, Hong Kong and Macao, and exported to Japan, Southeast Asia and the United States. Phoenix Narcissus enjoys the reputation of "beautiful shape, green color, fragrant taste and sweet taste". The tea strips are fat, the color is eel skin color, oily and shiny. Tea soup Huang Chengcheng, full of fragrance, refreshing and sweet, lasting fragrance, resistant to foam.
7. Other varieties:
[Edit this paragraph] Basic ingredients of oolong tea
As we all know, drinking tea has many benefits. But why does drinking tea have many benefits? For the average person, this is knowing it but not knowing why. With the development of science, it was not until1at the beginning of the 9th century that the composition of tea industry became clear.
After modern scientific separation and identification, oolong tea contains more than 450 organic chemical components and more than 40 inorganic mineral elements. Organic chemical components and inorganic mineral elements in tea contain many nutrients and medicinal components. Organic chemical components mainly include tea polyphenols, plant alkaloids, protein, amino acids, vitamins, pectin, organic acids, lipopolysaccharides, sugars, enzymes and pigments. Tieguanyin contains organic chemical components such as tea polyphenols, catechins and various amino acids, which are significantly higher than other teas. Inorganic mineral elements mainly include: potassium, calcium, magnesium, cobalt, iron, manganese, aluminum, sodium, zinc, copper, nitrogen, phosphorus, fluorine and so on. Tieguanyin contains more inorganic mineral elements such as manganese, iron, fluorine, potassium and sodium than other teas.
[Edit this paragraph] The therapeutic effect of oolong tea.
Medical researchers in China claim that oolong tea can reduce weight. The popularity of oolong tea is entirely due to its fat-dissolving and slimming effect, and this statement does have scientific basis. Because tannic acid, the main component of tea, is proved to be closely related to fat metabolism, and the experimental results also confirm that oolong tea can really reduce the cholesterol content in the blood, which is really a rare slimming tea. Experiments show that drinking one liter of oolong tea every day can inhibit the rise of cholesterol. Although the amount to drink depends on everyone's physical condition, when the food is too greasy, it is best to match oolong tea, which will not only make you feel full, but also remove greasy.
Health care function of oolong tea;
1, eliminating reactive oxygen species harmful to beauty and health;
2. Drinking 1 L oolong tea every day can improve skin allergy;
3, drinking oolong tea can lose weight:
4. Anti-tumor and anti-aging effects.
I have long known that tea is magical. Lu Quan, a poet in the Tang Dynasty, described the efficacy of tea in this way: "One bowl moistens the throat, two bowls are lonely and boring, and three bowls are poor, with only 5,000 volumes of words; Four bowls of light sweat, unfair life, scattered to the pores; Five bowls of clear skin; Six bowls of fairy spirits; Seven bowls can't be eaten; I just feel a breeze under my arm. " In the Song Dynasty, Wu Shu's "Tea Fu" said: "It's wonderful for a husband to quench his thirst and turn his bones into light weight, thanks to tea milk." Li Shizhen's Compendium of Materia Medica in the Ming Dynasty said: "Tea tastes bitter and cold, and the yang in the yin will sink, which can best reduce the fire.".
Oolong tea, as a famous tea unique to China, has been confirmed by modern scientific research institutes at home and abroad. Oolong tea not only has the health care functions of refreshing mind, relieving fatigue, promoting fluid production and diuresis, relieving fever and disease, sterilizing and diminishing inflammation, promoting digestion and relieving fatigue, losing weight and keeping fit, but also has the special functions of preventing cancer, reducing blood fat and resisting aging.
First, cancer prevention.
1June 998 15 Health News (Reporter Zheng Yuanxiang) Not long ago, Han Chi, an associate researcher in the Toxicology Laboratory of Institute of Nutrition and Food Hygiene, Chinese Academy of Preventive Medicine, and her assistant Xu Yong conducted an anti-cancer experiment of tea on animals. They fed mice five kinds of tea, such as Anxi Tieguanyin, and at the same time, they were fed methyl carbazide glue, a synthetic carcinogen with purity greater than 99.8%. After three months, the incidence of esophageal cancer in rats was 42-67%, and the average number of tumors in rats with cancer was 2.2-3. The incidence of esophageal cancer in rats who did not drink tea was 90%, and the average number of tumors in mice with cancer was 5.2. Five kinds of tea have the best anticancer effect in Anxi Tieguanyin. At the same time, they also conducted another experiment, that is, using sodium nitrite and methyl carrageenan as carcinogenic precursors. The results showed that none of the rats in the tea drinking group developed esophageal cancer, and the incidence rate was 100%. This result proves that tea can completely block the endogenous formation of nitrite nitrogen in the body.
Second, reduce blood fat.
198 1 year, a male professor from Toyomi Miyagawa, Kawamura and a foreign women's university conducted an experiment on the effect of oolong tea on animal fat metabolism, which proved that oolong tea can significantly inhibit the increase of cholesterol and neutral fat in blood.
From 65438 to 0983, Fujian Institute of Traditional Chinese Medicine observed a group of patients with hypercholesterolemia. When they stopped using all kinds of lipid-lowering drugs, they drank oolong tea twice every morning and evening. After 24 weeks in a row, the blood cholesterol content of patients decreased to varying degrees. Further animal experiments show that oolong tea can prevent and alleviate atherosclerosis of aortic blood lipids. Drinking oolong tea can also reduce blood viscosity, prevent erythrocyte aggregation, improve blood hypercoagulability, increase blood fluidity and improve microcirculation. This is very important for preventing vascular diseases, intravascular thrombosis and traditional Chinese medicine? Quot Blood stasis has positive significance. In addition, in vitro thrombosis test also shows that oolong tea has the effect of inhibiting thrombosis.
Third, anti-aging.
65438-0983 Anti-aging experiments conducted by Fujian Institute of Traditional Chinese Medicine showed that the lipid peroxidation in the liver of two groups of animals fed with oolong tea and vitamin E decreased obviously, indicating that oolong tea has the same anti-aging effect as vitamin E. Human experiments also showed that drinking oolong tea can keep the content of vitamin C in blood at a high level and reduce the excretion of vitamin C in urine. The anti-aging effect of vitamin C has long been proved by research. Therefore, drinking oolong tea can enhance the anti-aging ability of human body in many ways.
1985 10 professor Wang Zenong wrote a poem during his inspection in Anxi tea town, which highly summarized the health care efficacy of Anxi oolong tea: Anxi is as fragrant as Tieguanyin, and six roots prolong life. Huang Jingui, a newly selected famous tea, is a panacea to protect Dan's heart. After serving for thousands of years, it is beautiful, cures all diseases, and is light and light.