How many times is it the most dangerous to drink the wrong tea to cause cancer?

　　Tea drinkers can easily feel the effect of tea on the gastrointestinal tract: hungry faster. This is because tea contains complex components such as caffeine, theophylline and theobromine, which can significantly stimulate gastric acid secretion and promote gastric motility. Increased gastric acid secretion (and accelerated gastrointestinal motility) helps food digestion, making people feel less fat or greasy or hungry faster.

　　 But don’t think that “fat-relieving and greasy” or “hungry” is to lose weight, because drinking tea only changes the process and feeling of digestion, not the result of digestion. The energy you eat three times a day, whether it is sugar, protein or fat, will not be run away by drinking tea. Obviously, drinking tea does not change your food intake or the composition of your feces. It only changes the digestion process from food to feces. How is it possible to lose weight?

　　Puer tea and black tea The effect of stimulating the secretion of stomach acid is stronger than that of green tea, so drinking Pu''er tea is more likely to be hungry. I have seen someone who suffers from stomach pain (related to increased gastric acid secretion and damage to the gastric mucosa) drinking Pu''er to lose weight. Others try to use caffeine''s excitement to reason about the weight-loss effect of tea. Caffeine excites people and increases basic metabolic energy consumption, which can lead to weight loss. Caffeine does make people more mentally and exercise more, but it has little effect on basal metabolism. So tea, coffee, caffeinated beverages, etc. are not enough to achieve the purpose of weight loss.

　　Unspent tea is most likely to form tea scale

　　Scientific research shows that drinking water contains minerals and traces of harmful heavy metal ions, such as cadmium, mercury, and arsenic. When the water is heated, as the temperature of the water increases, the solubility of certain calcium and magnesium ions decreases, and the concentration of insoluble salts continues to increase. When the water is concentrated to a certain degree, it precipitates out. These precipitates can enter the tea cup with the water brewing tea. Tea that has not been consumed or left for a long time is exposed to the air, and the tea polyphenols in the tea and the metal elements in the tea rust will oxidize and produce Brown tea rust, commonly known as tea scale, adheres to the inner wall of the cup. Tea rust contains cadmium, lead, mercury, arsenic and other harmful metals, which is the culprit that endangers human health.

　　 "Tea scale contains toxic substances such as cadmium, lead, mercury, arsenic, and carcinogens such as nitrite. These substances will adhere to the smooth surface of the tea cup. As tea enters the body, it enters people’s digestion The system, combined with proteins, fatty acids, vitamins, etc. in food, produces insoluble precipitates, which not only hinders the body''s absorption and digestion of these nutrients, but also damages the stomach and other organs. In addition, tea cups that are often not cleaned, There is still more scale, which also contains a lot of heavy metals, which is extremely bad for health." At the same time, these oxides can cause nerve, digestion, urinary and hematopoietic system diseases and functional disorders, and even cause premature aging, especially arsenic, Cadmium can cause cancer, cause fetal malformations, and endanger health.

　　The thicker the tea dirt, the harder it is to clean up, so daily cleaning is as important as regular cleaning. Experts suggest that after drinking tea every time, even if there are no obvious tea stains on the tea set, they should be carefully cleaned to avoid accumulation.

　　 1. The tea scale deposits have been difficult to clean for a long time. Soak them with heated rice vinegar or baking soda all day and night, and then brush them with a toothbrush to clean them easily. It should be noted that if you use a clay teapot, you do not need to clean it like this. The teapot itself has stomata, and the minerals in the tea scale can be absorbed by these stomata, which can play a protective role in the pot, and will not cause harmful substances to "run" into the tea water and be absorbed by the body.

　　 2. Put a teaspoon of orange powder or orange juice into the tea cup or teapot, fill it with fresh water and leave it for 2-3 hours, so that the tea scale and tea set lose their adhesion and can be easily removed .

　　3. Add water to the teapot or teacup, put the potato skins, heat and boil, rinse after cooling, it is easy to clean.

　　4. When using metal tea time, it will become black due to tea dirt. If it cannot be washed off with a medium detergent, it can be soaked in vinegar or soaked in bleach. dirt.

　　 5. Apply edible salt on the inside, especially where there is tea stains. Then use a toothbrush to vigorously scrub the teacups, and finally rinse with clean water.

　　 Experts specially remind that it is better not to use rough cleaning tools such as steel balls or cleaning balls to remove the tea stains, because these cleaning tools are easy to damage the enamel on the inner wall of the tea set, making it more and more The thinner, the tea scale generated in the future will easily penetrate into the deep layer of the tea set, which is extremely difficult to completely remove. Individuals should use a soft bristle brush or toothbrush, a gentle cleaning cloth, etc. to clean.

　　Tea in bags is best brewed only once, but not more than 3 times in bulk tea

　　In addition to tea stains, it is not clear that it is harmful to health. Health? Many people do not know.

　　 Some people in life like to brew tea repeatedly until they can’t taste it. Some people change their tea quickly after brewing once or twice. Which of these two methods is correct? How many times is a cup of tea brewed? Yin Junfeng, an associate 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 times the tea is brewed It has a lot to do with the tastes of different people, but in terms of nutrient absorption, it is best to brew tea in bags only once, but not in bulk tea more than 3 times.

　　He explained that tea contains tea polyphenols with cancer suppressing effect, tea polysaccharides that can lower blood sugar, caffeine that excites the central nervous system, and various nutrients such as amino acids and vitamins. How much of these nutrients can be precipitated has a lot to do with the number of brews. Generally speaking, the larger the shape of the tea leaves, the slower the precipitation rate of nutrients; the smaller the particles, the faster the precipitation rate.

　　Compared with bulk tea, the tea leaves in the bag are cut and kneaded during processing to fully destroy the leaf cells, the particle shape is relatively small, and the nutrients in the tea are the first after 3-5 minutes During the second soaking, 80%-90% will be precipitated. After the second brewing, about 10% of the remaining nutrients are almost completely precipitated. Therefore, Yin Junfeng suggested that it is best to brew the tea in a bag once, which will not only lose nourishment, but also will not affect the taste and taste. Bulk tea is better because the particles are larger, the first brewing time is better, it should be about 5 minutes, the nutrients in it will precipitate 60%-80%; after the second brewing, there will be 80%- After the third brewing of 90% of the nutrients, the leaching rate of the nutrients will exceed 95%, and the brewing will have no nutritional effect.

As far as some experts pointed out, after multiple brewing of tea leaves, harmful substances such as pesticides and heavy metals will be leached out. Yin Junfeng said that although this argument makes sense, there is no need to worry too much. At present, most of the pesticides used in tea production in China have very low water solubility. Calculated on the basis of 10 grams of tea per person per day, even if brewing 1 mg/kg of residual tea, the intake of pesticides is only 0.0001 mg, which is allowed by the World Health Organization. Thousands of intake. 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.

　　12g per day is the most suitable

　　Jiang Heyuan, associate researcher of the Tea Research Institute of Chinese Academy of Agricultural Sciences, suggests that for ordinary people, drink about 12g of tea a day, divided into 3~ 4 brews are suitable. People who eat more greasy food and a large amount of tobacco and alcohol can increase the amount of tea appropriately. Pregnant women and children, neurasthenia, tachycardia, the amount of tea drinking should be appropriately reduced. Han Chi reminded that with the popularity of Kung Fu tea, people drink tea "increasingly hot", which is very wrong. "People drink tea for health care, but drinking hot tea will increase the incidence of cancers such as esophageal cancer, more than gains. The best temperature for drinking tea should be about 60 ℃, not more than 70 ℃."

　　 In addition, You can drink different teas at different times of the day: drink a light green tea in the morning to refresh your mind; drink jasmine tea in the morning, fragrant and pleasant, which can improve your work efficiency; drink a cup of black tea in the afternoon to relieve difficulties; refresh with your friends or family at night Reunion, soak in a pot of oolong or Pu''er, do not have a taste, it will not affect sleep.