What are the dangers of drinking strong tea?
In general, thick tea is tea with a large amount of tea, long brewing time, and bitter and astringent taste. For example, the bubble Pu'er tea, oolong tea cover bowl covered with foam, jasmine tea in a glass of 3/4 are jasmine, that bubble tea must be strong tea is no doubt. In addition to the large amount of tea, it takes a long time to bubble and it is too long to be a cause of strong tea. Some friends, for instance, originally shot a few teas in the teacup and prepared a cup of tea in the United States and the United States. But because of a phone call from the boss or the customer, he was eager to handle the work. For a long time, I forgot my own tea. When it was discovered, the tea was already too strong.
Drinking strong tea often has these hazards
Cause anemia
Modern medical research has found that tannic acid in tea will form insoluble precipitates with ferric iron, affecting the absorption of iron in the body. In particular, drinking tea after meals will cause iron in food to be excreted due to poor absorption and cause anemia.
The iron, protein, vitamins and other substances necessary for the human body are usually ingested in the daily diet. The tea contains a large amount of tannic acid. After drinking a large amount of tea, the tannic acid and iron combine to form an insoluble substance. The absorption of iron, if you often drink strong tea after a meal, can cause iron deficiency in the body, causing iron deficiency anemia.
2. Damage to kidney function
Tea is rich in oxalic acid, often drinking strong tea can lead to high oxalic acid urine, easy to form calcium oxalate stones in the urinary tract, causing kidney stones. Secondly, drinking too much tea will cause the kidneys to urinate frequently, which will increase the burden on the kidney and cause kidney damage.
In addition, strong tea contains high fluoride, kidney is the main excretion of fluoride, when the body's intake of excessive fluoride exceeds the kidney's excretion capacity, resulting in fluoride accumulation in the body, the amount of fluoride in the kidney will increase significantly. Experiments have shown that excess fluoride in the kidney can cause damage to the kidney's cortex and medulla tubules in animals.
3. Promote blood pressure
Drinking strong tea is a non-negligible factor that causes high blood pressure, especially people who drink large amounts of tea and love to drink strong tea. According to clinical observations, drinking strong tea can increase blood pressure, which may be related to the presence of caffeine active substances in tea. In daily life, some people will feel dizzy and have headache after drinking tea. This may be due to the increase of blood pressure.
Excessive drinking of strong tea can also cause people who drink tea infrequently or in an empty stomach to have “chafing†phenomena. After drinking tea, they feel palpitations, fatigue, irritability, dizziness, vertigo, and even standing unsteady and staggering.
4. Affect the heart
Tea contains 2% to 5% caffeine, and strong tea has higher caffeine content. A cup of strong tea contains about 100 milligrams of caffeine. Excessive caffeine can cause excessive nervous excitement and cause insomnia. At the same time, it can also cause rapid heartbeat, which is not beneficial for patients with coronary heart disease suffering from tachycardia, premature beats and atrial fibrillation. .
5. Cause stomach discomfort
Regular drinking of strong tea can promote excessive gastric acid secretion, which can easily lead to dilution of gastric juice and cannot be properly digested. One person daily normal secretion of gastric juice is 1 î€ 5 î€ 2 î€ 5 liters, these gastric juices can properly digest the food a person eats every day. When a lot of drinking tea will dilute the gastric juice, reduce the concentration of gastric juice, so that gastric juice can not properly digest food, resulting in indigestion, abdominal distension, abdominal pain embolism, and some even cause duodenal ulcers.
Drinking strong tea can cause stomach problems and even gastric ulcers. Concentrations of caffeine and theophylline in strong teas increase the excitability of the central nervous system, which can cause gastric motility to accelerate, hypersecretion of gastric parietal cells, and increase of stomach acid. Increased mucosal irritation can easily lead to gastric ulcers. Caffeine can also be addictive, creating a vicious circle.
6. Influence the absorption of nutrition
Often drinking strong tea will cause the loss of a variety of nutrients, strong tea contains more tannic acid, tannic acid and food protein, vitamin B1, iron ions, so that these nutrients can not be normally absorbed, easily lead to lack of human nutrition And produce the corresponding symptoms.
7. Easily injured bone
There are more caffeine in the strong tea, and caffeine can both inhibit the absorption of calcium in the duodenum and accelerate the excretion of calcium in the urine. Due to the dual effects of inhibiting absorption and accelerating excretion, calcium deficiency in the body can easily lead to calcium loss in the bones. As time passes, it can easily lead to osteoporosis.
8. Constipation.
The tea polyphenols in tea have a strong convergence to the gastrointestinal mucosa. The high tea polyphenol content in strong tea has a stronger astringency, which will slow down the contraction of the stomach and the peristalsis of the intestinal tract, thus affecting the digestion of the food. Absorption can easily cause dry stools or even constipation.
9. Women often drink tea during menstruation, pregnancy and lactation are harmful to health
Pregnant women who drink strong tea are not only susceptible to anemia, but also are not conducive to the absorption of other nutrients. Caffeine stimulation can accelerate heart rate, increase urination, and increase the burden on the heart and kidneys; caffeine not only affects the absorption of the fetus's nutrition, but also increases the number of fetal movements, so that the fetus is stunted, even leaving congenital hidden dangers, both maternal and fetal health unfavorable.
If drinking tea during lactation, caffeine can stimulate the baby to stimulate the excitement through the milk, so that the baby is in an uneasy state, affecting the child's growth and development. In addition, tannic acid can inhibit breast milk and affect breastfeeding.
Due to excessive blood loss during menstruation, drinking strong tea is not conducive to the absorption of iron and can easily lead to anemia. Can also cause dysmenorrhea and prolong the menstrual period due to stimulation of caffeine.
10. Tea drunk phenomenon
Excessive drinking of strong tea can also cause people who drink tea infrequently or fasting tea to have a phenomenon of “tea drunkâ€. After drinking tea, they feel palpitation, fatigue, irritability, dizziness, vertigo, and even standing unsteady and staggering.
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