[Dietotherapy] When is drinking tea harmful to health?
Constipation
Because tea polyphenols have a certain convergence effect on gastrointestinal mucosa, it affects the digestion and absorption function of food, makes stool dry, and causes constipation or aggravation.
Neurasthenia or insomnia.
Because caffeine in tea has obvious exciting effect on human central nervous system, drinking tea, especially strong tea, will make people's brains in an overexcited state and can't get rest.
When suffering from gastric ulcer
Drinking a lot of tea before and after meals will dilute gastric juice and affect digestion. Drinking a lot of tea will greatly increase the secretion of gastric acid, affect the healing of ulcer surface and aggravate the condition. Patients with ulcers should drink less tea, especially not a lot of strong tea.
When suffering from heart disease or hypertension
Excessive drinking tea will increase the burden on the heart, increase the heart rate and blood pressure, which is extremely unfavorable to patients with heart disease and hypertension.
When suffering from atherosclerosis
Tea contains many bioactive substances, such as caffeine, theophylline and theobromine. It can accelerate the excitability of cerebral cortex, cause cerebrovascular contraction, insufficient blood supply, slow blood flow and promote cerebral thrombosis. It can also cause coronary artery contraction spasm, myocardial ischemia, angina pectoris, palpitation, chest tightness and arrhythmia.
Female menstrual period
Menstrual blood will take away some iron, so women should supplement iron-rich foods, such as spinach, apples and grapes. However, because tea contains as much as 30% to 50% tannic acid, it will hinder the absorption and utilization of iron by intestinal mucosa, and it is easy to precipitate with iron in chyme or iron stone in blood-enriching drugs in the intestine.
A woman in labor
Drinking too much strong tea before delivery will lead to insomnia due to the exciting effect of caffeine. If you don't get enough sleep before delivery, it will often lead to exhaustion, labor pains and even dystocia.
Menopause
Entering menopause, besides dizziness and fatigue, sometimes there will be tachycardia, emotional impulse, lack of sleep, and women will also have symptoms such as menstrual disorders. For example, excessive drinking tea will aggravate these symptoms, which is not conducive to a comfortable menopause.
When anemia occurs,
Tannic acid in tea can precipitate iron in diet, which is not easy to absorb. Iron is an important raw material for making red blood cells. Iron deficiency in the body will hinder the production of red blood cells and cause iron deficiency anemia. Long-term tea drinkers often have different degrees of iron deficiency, which has the greatest impact on the constitution of blood deficiency and blood deficiency.
Calcium deficiency or fracture
Because the alkaloids in tea will inhibit the absorption of calcium by duodenum. At the same time, it can also promote the excretion of calcium in urine, so that the calcium in the human body is less and less, leading to calcium deficiency and osteoporosis, making it difficult to recover the fracture.
When suffering from gout
Because tannic acid in tea will aggravate the patient's condition, it is not suitable for drinking tea, let alone tea soaked for too long.
When suffering from osteoporosis
The latest research found that drinking strong tea is one of the important causes of osteoporosis. Drinking strong tea often will lead to calcium deficiency, because on the one hand, caffeine in strong tea will promote the excretion of calcium in urine; On the other hand, caffeine can inhibit the absorption of calcium in the intestine, making the absorption of calcium incomplete.
Have a high fever.
For patients with fever, it is best to give boiled water, mineral water or light tea, but it is not advisable to drink strong tea. Theophylline can raise body temperature and aggravate fever, and its diuretic effect will also reduce the efficacy of antipyretic drugs.
When taking certain drugs,
Tannic acid in tea often precipitates the effective components of digitalis, iron and Chinese patent medicine supplements, which are not easily absorbed; Taking pepsin or multi-enzyme tablets while drinking tea will coagulate protein in medicine, and the curative effect is difficult to achieve.
:: Female pregnancy
The concentration of caffeine in strong tea is as high as 10%, which will aggravate the urination and heartbeat of pregnant women, increase the burden on their hearts and kidneys, and induce pregnancy poisoning, which is not conducive to the health of the mother and fetus.
Female lactation
During this period, if you drink a lot of tea, the high concentration of tannic acid in tea will be absorbed by mucous membrane and enter the blood circulation, which will have astringent and inhibitory effects on mammary gland secretion, resulting in insufficient milk secretion. On the other hand, caffeine in tea will also enter the baby's body through milk, which will affect the baby's health.
Clear drinking can be divided into four levels. Treating tea as a drink to quench your thirst and drinking it in a big bowl of sea is called "drinking tea". Pay attention to the color, fragrance and water quality of tea sets, and carefully "taste" when drinking, which can be called "tasting tea". If we pay more attention to the environment, atmosphere, brewing skills and interpersonal relationships, we can call it "tea art". Philosophy and ethics are integrated into tea activities to cultivate our self-cultivation and sentiment through tea tasting. Taste life and get spiritual enjoyment. This is the highest state of China's diet, which is called "Tea Ceremony".
The Seven Bowls of Tea Songs written by Lu Quan in the Tang Dynasty can best describe the gradual sublimation of tea drinking from quenching thirst to self-cultivation: one bowl moistens the throat, two bowls are lonely and boring, three bowls are heartbroken, but there are only five thousand volumes of words and four bowls of sweat, which scatter all the troubles of life into the pores, five bowls are light, six bowls are immortal, seven bowls are not allowed to drink, and two bowls are cool under the armpit. What level do we know about tea? This tea song can help us to measure the level of sending love to tea, melting love to tea and forgetting love to tea.
In addition, drinking tea is a life habit of southerners, which can be generally divided into morning tea, afternoon tea (afternoon tea is a life habit introduced from the west) and evening tea.
Drinking tea is not simply making tea, but going to a teahouse (restaurant) to make a pot of tea and then ordering all kinds of things to eat. Morning tea is breakfast, evening tea is midnight snack, and afternoon tea is a habit from the west, and drinking tea and eating snacks after a nap.
The most representative foods for morning tea and evening tea are steamed ribs and chicken feet. Hotels in the south generally have morning tea markets and evening tea markets, while afternoon tea markets are mostly opened by western restaurants.