CHINA GREEN TEA is a traditional beverage in our countr […]
CHINA GREEN TEA is a traditional beverage in our country. It contains a lot of tannic acid, theophylline, caffeine and a small amount of aromatic oil, multiple vitamins, chlorophyll and other ingredients. Drinking tea in moderation can produce body fluids and quench thirst, remove dampness, clear away heat, refresh the brain, cure diseases and lighten the body, which is of great benefit to human health. However, as a special beverage, tea has its inherent contraindications. Medical experts warn us that only proper tea drinking is a good habit for health care.
The so-called proper, one refers to the moderate strength of the tea, generally 3 grams of tea leaves are used to brew a cup of tea. Too much tea will affect the body's absorption of iron and other inorganic salts in food, causing anemia; second, control the amount of tea drinking, 8-10 cups a day is appropriate, excessive tea consumption will increase the burden on the human kidneys; third, tea drinking The time should not be less than one hour before and after meals, otherwise it will affect the body's absorption of protein; fourth, you should pay attention to taboos. The following patients should not drink tea:
Patients with anemia, especially those suffering from iron deficiency anemia, the tannic acid in tea can cause iron in food to form precipitates that cannot be absorbed by the body, which often aggravates the condition.
Patients with neurasthenia, hyperthyroidism, and tuberculosis because the caffeine in tea can increase the basal metabolism and exacerbate the condition.
Patients with gastric and duodenal ulcers Because the caffeine in tea can stimulate the secretion of gastric juice and ulcers, making stomach diseases and ulcers aggravated.
Patients with liver and kidney disease Caffeine in tea has to be metabolized by the liver and kidneys. For people with liver and kidney dysfunction, it is not conducive to the recovery of liver and kidney function. Patients with habitual constipation The tannic acid in tea has an astringent effect and makes constipation worse. Patients with kidney and urethral stones The tannic acid in tea can cause more stones.
Patients with high blood pressure and heart disease The caffeine in tea has a stimulating effect on human blood and blood pressure. Drinking too much tea will speed up blood flow, increase blood pressure, and may even cause arrhythmia.
Pregnant women drinking too much tea can cause anemia and cause the newborn to lose weight due to insufficient maternal blood supply.
Breastfeeding women Because the caffeine in tea can enter the baby's body through the milk, the baby will have cramps, irritability, and crying for no reason.
Eight kinds of tea can not drink strong tea. Strong tea contains a lot of caffeine, theophylline, etc. It is very irritating. Drinking strong tea can cause insomnia, headache, tinnitus, and vertigo. It is not good for the stomach and intestines. Some people also produce Feeling of vomiting.
Moldy tea contains a lot of toxins. Chuanwei tea has some toxic flavors, such as paint and camphor.
Jiaoweicha Tea that has been roasted over fire has lost its nutrition and tastes bad.
Overnight tea, especially the changed flavor of tea, even if you still can't taste the changed flavor, it still breeds and multiplies a lot of bacteria.
Brewing tea for a long time If the tea leaves are brewed for too long, many substances that are harmful to the human body are brewed out.
Cold tea Tea should be drunk warm and hot. Cold tea has the disadvantages of stagnating cold and accumulating phlegm. Hot tea Tea is generally brewed with boiling water, but it should not be drunk when it is overheated. Things that are overheated are extremely detrimental to the human intestines and stomach.
Love tea and wash cups frequently. Some people who drink tea often like a thick layer of "tea dirt" accumulated in their cups, which seems to indicate that they are a "tea-loving" clan. Some people even think that brewing tea with a tea set with tea stains is more flavorful. In fact, tea dirt is extremely harmful to human health. For this reason, medical experts warned that if you love tea, do not forget to wash your cups.
Scientific research shows that in a humid environment, tea water will quickly oxidize brown tea rust, which contains cadmium, lead, mercury, arsenic and other harmful metals. If the tea is not consumed or stored for a long time, and is exposed to the air, the tea polyphenols in the tea and the metal substances in the tea rust will oxidize in the air, which will generate tea dirt and attach to the inner wall of the tea set. Build thicker.
Someone once carried out sampling tests on tea dirt and found that tea dirt also contained certain carcinogens, such as nitrite, which were obviously threatening to human health. Tea dirt continuously enters the digestive system of tea drinkers, and is easily combined with protein, fatty acid and vitamins in food to form a variety of harmful substances, which will not only hinder the body's absorption and digestion of nutrients in food , It also damages many organs. Therefore, tea lovers should also wash their cups frequently. For tea cups that have been deposited for a long time, scrub with toothpaste repeatedly to remove them; for teapots that have accumulated tea, heat them with rice vinegar or soak them in baking soda for a day and night, then shake them and rinse them repeatedly.