China is the home of tea, Chinese people drink tea, is said to have begun in the Shennong era, at least 4700 years. Properly drink a few cups of tea every day, is a long life tea, cancer prevention tea, but if you drink the wrong way, it may become disease-causing tea, harmful tea. A cup of strong tea a hundred harmless We are going to say today this wrong way of drinking, many people have, drinking tea may be half a cup are tea, always feel that this is enough taste. Jung reminded, love to drink strong tea attention, this habit a hundred harm and no benefit. 1, strong tea destroys the kidneys Strong tea contains high fluorine, often drink strong tea will damage the kidneys. Because the kidneys are the main excretory organ of fluorine, when the body intake of excess fluorine more than the excretory capacity of the kidneys, resulting in the accumulation of fluorine in the body, the kidneys will significantly increase the amount of fluorine. This leads to “tea-type fluorosis”. Almost everyone has a notion that strong tea relieves alcohol, but in fact drinking strong tea after drinking is equivalent to “adding insult to injury” and “pouring oil on the fire”. Because the tea has theophylline has a diuretic effect. After drinking a lot of alcohol, the alcohol will not be able to break down with the tea into the kidneys, the kidneys are damaged. In addition, tea also contains substances that form stones, often drink strong tea people should pay attention to whether they suffer from kidney stones. 2, strong tea destroys the stomach strong tea contains too much caffeine, theophylline, etc., will stimulate the stomach lining cells, resulting in excessive stomach acid. In the long run, the gastric mucosa will be stimulated and damaged, resulting in inflammation, congestion, edema, erosion, and even gastric ulcers, gastroesophageal burns, ulcers. Survey shows that about 70% of gastric ulcer patients have like to drink strong tea. In addition, the caffeine in strong tea can also make people addicted, forming a vicious circle. 3, strong tea destroys blood vessels elderly people’s blood vessels are fragile, light green tea is conducive to the treatment of hypertension, but strong tea will cause brain excitement, restlessness, insomnia, palpitations and other discomforts, thus making blood pressure rise. In addition, the stimulating effect of caffeine will prompt rapid heartbeat, accelerated blood flow and faster whistling, which will easily lead to arrhythmia or tachycardia and produce palpitation symptoms, which is very unfavorable to patients with coronary heart disease suffering from tachycardia, premature beats and atrial fibrillation. Drinking strong tea will increase the blood volume, and to a certain extent will also increase the heart burden and heart failure symptoms. These are sometimes very fatal to cardiovascular patients. 4, strong tea destroys bone The caffeine content in strong tea is high, and caffeine can inhibit both the absorption of calcium in the duodenum and accelerate the excretion of calcium in the urine. Due to the dual role of inhibiting absorption and accelerating excretion, resulting in a lack of calcium in the body, easy to induce calcium loss in the bone, over time, there will be osteoporosis, prone to fractures. 5, strong tea ruin sleep strong tea will lead to insomnia this we all know, tea contains 2% to 5% caffeine, strong tea in the caffeine content is even higher. A cup of strong tea contains about 100 mg of caffeine, excessive caffeine can lead to excessive nervous excitement, causing insomnia. 6, strong tea ruin nutrition strong tea contains tannic acid, will prevent the body’s absorption of iron, manifested as iron deficiency anemia, and can also be combined with food protein, vitamin B1, leading to constipation. Nutrition experts found that excessive tea will increase the amount of urine, causing the loss of magnesium, potassium and other important nutrients. 7, strong tea ruin the effect of medicine tea in the tannin, theophylline is also easy to hypnotic, sedative and other drugs and iron-containing drugs, enzyme drugs and other drugs chemical changes, it is generally believed that the medicine should not drink tea within 2 hours. 8 kinds of people should not drink tea should be light and should not be strong, occasionally a few drinks of strong tea will not be a big problem, but the following 8 kinds of people can not drink, wrong drink injury or even death. 1, gastric ulcer strong tea can cause increased secretion of gastric acid, increasing the stimulation of the ulcer surface, affecting the healing, aggravating gastric disease. At the same time, drinking strong tea during medication will reduce the efficacy of gastric drugs, which is not conducive to recovery from the disease. 2, arrhythmia tea contains theophylline and other substances, these substances have a significant excitatory effect on the central nervous system, so that the rapid acceleration of the human heartbeat, resulting in tachycardia, and even palpitations, which is a potential threat to patients with cardiovascular atherosclerosis. A large amount of strong tea into the blood, increasing blood volume, can increase the burden on the heart, increasing the degree of heart failure. 3, hyperthyroidism The basal metabolic rate of hyperthyroid patients is already very high, if a large intake of caffeine in tea, will accelerate the metabolism, there is an increase in the consumption of various nutrients, so that hyperthyroid patients can not get a good rest and aggravate the condition. 4, glaucoma Strong tea will stimulate the nervous system, causing an increase in intraocular pressure. Heavy can cause the eye capillary dilation, eye congestion increased, and even lead to acute attacks of glaucoma. 5, gout tea contains purine compounds, which will aggravate the gout disease, gout patients should drink less. 6, kidney stones, constipation Because tea contains tannic acid to promote the formation of stones, the prevention of kidney stones and control the condition of kidney stones is very unfavorable, so kidney stones patients should not drink strong tea. In addition, strong tea contains tannic acid, which has the effect of reducing the intestinal mucosa secretion of mucus, so that the intestinal fluid secretion is reduced, can not lubricate the intestines. Fecal retention time in the intestine is prolonged, the intestinal wall of fecal water overabsorption, causing dry feces, discharge difficulties, therefore, constipated people should also drink less. 7, depression Strong tea is easy to make people excited, aggravating the symptoms of insomnia in depression, it is recommended that they drink some light tea in the morning properly. 8, menstruation, pregnancy, childbirth, lactating women Menstruation due to excessive blood loss, drinking strong tea is not conducive to the absorption of iron, easily lead to anemia. Can also cause dysmenorrhea and prolong the period due to the stimulation of caffeine. Pregnant women drink strong tea, not only prone to anemia, and is not conducive to the absorption of other nutrients. Caffeine in strong tea not only affects the absorption of nutrients in the fetus, but also increases the number of fetal movements, so that the fetus is stunted, which is not good for maternal and fetal health. Drinking strong tea during childbirth can affect the rest due to excessive excitement, resulting in labor exhaustion, uterine contractions are weak, easy to cause obstructed labor. Drinking strong tea during breastfeeding, caffeine can stimulate the baby through the milk to cause excitement, so that the baby restless, affecting the growth and development of children. In addition, tannic acid can inhibit lactation of the mammary glands, affecting breastfeeding. What tea is considered strong tea? From the sensory point of view, strong tea basically has a common feature, the taste is too bitter, that is, the color is very thick and a little cloudy feeling, and when the tea is cooled, it will float a layer of tea oil on top. In terms of volume, healthy adults drink about 12 grams of tea a day, 3 grams each time, with 150 ml of water brewing is appropriate, if greatly exceeded this amount, it is a strong tea. Of course, in addition to strong tea, there is moldy tea, string tea, long bubble tea, too hot tea, raw tea, burnt tea, overnight tea can not drink, the body is not half good.