It's fatal to drink tea without cleaning it

Business club, Dec 6 a proverb has been circulating among the people in China: "a cup of tea in the morning will starve the seller of medicine" It can be seen that the health care effect of tea is extraordinary At the same time, there is a saying in our country, "if you drink tea without washing your cup, the king of hell will urge you." What's the harm of not washing the tea cup in time? How much tea does a person drink at most every day? How many times can tea be made? Let's open up these questions one by one The scientific research shows that drinking water contains minerals and trace harmful heavy metal ions, such as cadmium, mercury, arsenic and so on When the water is heated, with the increase of water temperature, the solubility of some calcium and magnesium ions decreases, and the concentration of insoluble salt increases continuously When the water is concentrated to a certain extent, it precipitates out These precipitates can be made into tea cups with water, and the tea that hasn't been drunk or put for a long time will be exposed to the air The tea polyphenols in tea and the metal elements in tea rust will be oxidized, resulting in brown tea rust, commonly known as tea dirt, which is attached to the inner wall of the cup The tea rust contains cadmium, lead, mercury, arsenic and other harmful metals, which is the main cause of harm to human health First "There are toxic substances such as cadmium, lead, mercury, arsenic and carcinogens such as nitrite in the tea dirt, which will adhere to the smooth surface of the tea cup," Li Hongzhu, an associate professor of Tianjin Institute of carcinogenic drugs, said in an interview As tea enters into the digestive system, it combines with protein, fatty acid and vitamin in food to form insoluble precipitate, which not only hinders the absorption and digestion of these nutrients, but also damages organs such as intestines and stomach In addition, the teacups that are often not cleaned still have more scale, which also contains a lot of heavy metals, which is extremely harmful to health " At the same time, these oxides entering the body will cause diseases and dysfunction of nervous, digestive, urinary and hematopoietic systems, and even lead to premature aging, especially arsenic and cadmium can cause cancer, cause fetal deformity and harm health How to thoroughly wash away the tea dirt the thicker the tea dirt, the more difficult it is to clean, so daily cleaning and regular cleaning are equally important Experts suggest that every time after drinking tea, even if there is no obvious tea stains left on the tea set, it should also be carefully cleaned to avoid accumulating more (1) it is not easy to clean the tea dirt for a long time Soak it in heated rice vinegar or baking soda for a day and night, and then brush it with toothbrush to clean it easily It should be noted that if the teapot is used, it does not need to be cleaned like this There are pores in the teapot The minerals in the tea dirt can be absorbed by these pores, which can maintain the teapot and will not cause harmful substances to "run" into the tea and be absorbed by the human body (2) put a small spoon of orange powder or orange juice and other fruit juice into the teacup and teapot, fill it with clear water, and then put it for 2-3 hours, so that the tea dirt and the tea set lose the adhesion, and it is easy to remove (3) add water to the teapot or cup, put the potato skin in it, heat it and boil it, rinse it after cooling, and it is easy to clean it (4) when using the metal tea separator, it will become black due to the scale If it can't be washed out with medium-sized detergent, it can be soaked in vinegar or bleach and then it can be easily cleaned (5) apply edible salt on the inner side, especially the place with tea dirt Then use the toothbrush to brush and wash the tea cup vigorously, and finally use the water to wash it Experts specially remind that it is better not to use steel wire ball or cleaning ball and other rough cleaning tools to clean the tea dirt, because these cleaning tools are easy to damage the enamel on the inner wall of the tea set, making it thinner and thinner, and the later generated tea dirt will easily penetrate into the deep layer of the tea set, which is very difficult to completely remove Individuals should use a small soft brush or toothbrush, soft cleaning cloth to clean It's better to brew tea in bags only once, but not more than three times in bulk Besides the tea dirt, it's harmful to health How many times can tea be most nutritious and healthy? Many people don't know Some people in life like to brew tea repeatedly until they can't taste it Some people rush to change tea after brewing once or twice Which is the right way? How many times is it better to brew a cup of tea? Yin Junfeng, a deputy researcher at the Tea Research Institute of the Chinese Academy of Agricultural Sciences, said that some people like to drink light tea and some people like to drink strong tea Although the number of tea brewing has a lot to do with the taste of different people, from the perspective of nutrition absorption, it is better to brew bagged tea only once and bulk tea no more than three times He explained that tea contains tea polyphenols, tea polysaccharides that can reduce blood sugar, caffeine that excites the central nervous system, and a variety of amino acids, vitamins and other nutrients How much these nutrients can be separated out depends on the number of times of brewing Generally speaking, the larger the shape of tea particles, the slower the speed of nutrient precipitation; the smaller the particles, the faster the speed of precipitation Compared with bulk tea, bagged tea leaves fully destroy leaf cells through cutting and rubbing during processing and manufacturing The particle shape is relatively small After the first soaking for 3-5 minutes, 80% - 90% of the nutrients in tea will be separated out After the second brewing, the remaining 10% of the nutrients on the left and right are almost all separated out Therefore, Yin Junfeng suggested that bagged tea should be brewed once, not only in terms of nutrient absorption, but also in terms of taste and taste Due to the large size of bulk tea particles, the first brewing time is better to be a little longer It should be about 5 minutes, in which 60% - 80% of the nutrients will be separated out; after the second brewing, 80% - 90% of the nutrients will be separated out After the third brewing, the leaching rate of the nutrients will be more than 95%, and then brewing, there is no nutritional effect As for some experts pointed out, tea after repeated brewing, will make the pesticides, heavy metals and other harmful substances leached Yin Junfeng said that although there is some truth to this statement, it is not necessary to worry too much At present, most of the pesticides used in tea production in China are very low in water solubility According to the calculation of 10 grams of tea per person per day, even if one mg / kg of residual tea is brewed, only 0.0001 mg of pesticides is consumed, which is one thousandth of the allowable intake per day stipulated by the World Health Organization The leaching rate of heavy metal lead in tea is also relatively low As long as the tea from regular manufacturers is purchased, its content will not exceed the national standard Drinking 12 grams of tea every day is most suitable for Jiang Heyuan, deputy researcher of the Tea Research Institute of the Chinese Academy of Agricultural Sciences For ordinary people, drinking about 12 grams of tea every day, brewing in three to four times is suitable People who eat more greasy food and have a large amount of alcohol and tobacco can increase the consumption of tea appropriately Pregnant women and children, neurasthenia and tachycardia should drink less tea Han Chi reminded that with the popularity of kungfu tea, people drink tea "more and more hot", which is very wrong The loss outweighs the gain Incidence rate of cancer such as esophagus cancer is increased The best temperature for tea drinking should be about 60 ℃, not more than 70 ℃ In addition, you can drink different teas at different times of the day: a cup of light green tea in the morning to refresh your mind; jasmine tea in the morning, which is fragrant and pleasant, can improve your work efficiency; a cup of black tea in the afternoon to relieve sleepiness and refresh your mind; a pot of black dragon or Pu'er when you are reunited with your friends or family in the evening, which has a unique interest and does not affect your sleep.