1. Black tea has the functions of quenching thirst, resisting radiation, preventing cancer, helping sober up, promoting digestion, losing weight, delaying aging and lowering cholesterol. It can enhance the sensitivity of brain central nervous activity, improve thinking ability, lower blood pressure and inhibit arteriosclerosis.
2. During the storage of aged black tea, microorganisms propagate and metabolize from generation to generation, producing a series of unknown small molecular active substances, namely secondary metabolites. These substances form slowly and their chemical properties are unstable. Only when they are kept in the original natural state can they have a special effect on the human body, and their efficacy is similar to that of the Millennium Ganoderma lucidum. Most people in Anhua have this experience. The effect of drinking aged black tea to treat gastrointestinal diseases can be said to be a "medicine for treating diseases".
Efficacy, Function and Taboo of Black Tea
The function of black tea:
1, reduce fat and lose weight
Obesity is a series of diseases caused by specific biochemical factors, such as diet regulation and energy metabolism disorder. A series of diseases caused by obesity have become the main killers endangering human health.
Tea polyphenols and their oxidation products in black tea can dissolve fat and promote the discharge of lipid substances, thus reducing the contents of total cholesterol, free cholesterol, low-density lipoprotein cholesterol and triglyceride in blood, thus reducing cholesterol deposition on arterial wall and reducing the incidence of arterialization. It can also activate protein kinase, accelerate fat decomposition and reduce body fat content. Through experiments on human body, scientists found that compared with people who drink ordinary water, the average daily energy consumption of people who drink tea is 67eal higher, and the fat oxidation rate is higher than 12%. This proves that black tea does have the function of reducing fat and weight.
2. Enhance gastrointestinal function and improve immunity.
The effective components of black tea can not only inhibit the growth of harmful microorganisms in human stomach, but also promote the growth and reproduction of beneficial bacteria (such as lactic acid bacteria), which has a good effect on regulating gastrointestinal function. Its alkaloids can promote the secretion of gastric juice, and flavanol can significantly enhance gastrointestinal peristalsis. The study also found that catechins and tea saponin in black tea can kill and inhibit the growth of oral bacteria, helicobacter, Escherichia coli, typhoid, paratyphoid, staphylococcus and other pathogenic bacteria, so they have obvious functions of relieving stagflation, stopping diarrhea and eliminating constipation, which is of great significance to white-collar workers who often sit and work, and is also a folk medicine for stopping diarrhea. Theanine in black tea has a good effect on enhancing human immunity.
Efficacy, Function and Taboo of Black Tea
3, anti-aging, regulating the role of the brain.
There is a synchronous process between the natural aging of human body and degenerative diseases including tumors and cardiovascular diseases, that is, cells are damaged by oxygen free radicals. More than 95% of free radicals in human body are oxygen free radicals, which are the basis of destroying biological macromolecules and participate in the occurrence and development of various diseases and aging. Under normal circumstances, free radicals in the human body are constantly produced and removed, which is in a state of balance. However, in some cases, the production and elimination of free radicals are out of balance, which leads to protein's degeneration and decreased enzyme activity, thus causing various diseases and accelerating aging. Catechins and compound flavonoids in black tea have very active hydroxyl hydrogen, which can provide a large number of hydrogen protons to react with free radicals and remove excess free radicals, thus protecting human health and longevity.
4. Reduce blood pressure and blood sugar
Theanine in black tea can inhibit the increase of blood pressure, while alkaloids and flavonoids can relax the wall of blood vessels, increase the effective diameter of blood vessels, and reduce blood pressure by relaxing blood vessels. Diabetes is one of the health killers of modern middle-aged and elderly people, and with the improvement of people's living standards and the intensification of population aging, the incidence of diabetes is gradually increasing. Diabetes is still an incurable disease, which is mainly controlled by drugs and diet regulation. Studies have proved that tea polysaccharide in tea has obvious hypoglycemic effect, which is similar to insulin. After injecting tea polysaccharide into mice for 7 hours, their blood sugar decreased by 70%. Black tea contains more tea polysaccharides and is an ideal drink to prevent and treat diabetes. Folk also use black tea to treat mild diabetes, and the stronger the tea, the better the effect. Black tea also has the functions of preventing cancer, reducing blood fat, preventing radiation and diminishing inflammation.
Efficacy, Function and Taboo of Black Tea
Precautions for drinking black tea:
1. Avoid drinking tea if you have a fever.
Caffeine in tea can not only raise the body temperature, but also reduce the efficacy.
2. Patients with liver disease should avoid drinking tea.
Most substances such as caffeine in tea are metabolized by the liver. If the liver is sick, drinking too much tea exceeds the metabolic capacity of the liver, which will damage the liver tissue.
3. neurasthenia, be careful with tea
Caffeine in tea can excite the nerve center. Drinking strong tea for neurasthenia, especially in the afternoon and evening, will cause insomnia and aggravate the condition. You can drink tea once in the morning and once in the afternoon during the day. It is better to drink scented tea in the morning, green tea in the afternoon and no tea at night. In this way, patients will be refreshed during the day, calm and comfortable at night, and can fall asleep early.
Pregnant women should avoid drinking tea, especially strong tea.
Tea contains a lot of tea polyphenols and caffeine, which has many unfavorable factors for the growth of the fetus in the mother's womb. In order to make the fetus develop normally and avoid excessive stimulation of caffeine to the fetus, pregnant women should drink less or not drink tea.
5. Women should not drink strong tea during lactation.
Drinking strong tea during lactation, too much caffeine will enter the milk, and children will be indirectly excited after breastfeeding, which will easily lead to less sleep and more crying.
6. Patients with peptic ulcer should drink tea carefully.
Tea is a stimulator of gastric acid secretion. Drinking tea can increase the secretion of gastric acid and stimulate the ulcer surface. Drinking strong tea often will worsen the condition. But for mild patients, you can drink some light tea after taking the medicine for 2 hours. Adding sugar black tea and milk black tea is helpful to diminish inflammation and protect gastric mucosa, and also has certain curative effect on ulcer. Drinking tea can also block the synthesis of nitroso compounds in the body and prevent precancerous mutation.
7. Avoid drinking tea because of malnutrition.
Tea has the function of decomposing fat. People who are already malnourished will be more malnourished if they drink tea to decompose fat.
8. Be careful when you are drunk.
Tea has the function of exciting the nerve center, and drinking strong tea after drunkenness will increase the burden on the heart.
Drinking tea will also accelerate diuresis, so that toxic aldehydes in alcohol will be discharged from the kidneys before decomposition, which is very irritating to the kidneys and harmful to health. Therefore, for people with heart disease or poor function, don't drink tea, especially don't drink a lot of strong tea; For healthy people, you can drink a small amount of strong tea. When you wake up, you can eat a lot of fruit or sip vinegar to speed up the metabolism of the human body and slow down the speed of drunkenness.
Solution.
9. Take medicine with tea with caution
There are many kinds of drugs with different properties. Can you drink tea and take medicine? You can't generalize.
Tannin and theophylline in tea can change chemically with some drugs. Therefore, when taking hypnotic sedative drugs, iron-containing blood-enriching drugs, enzyme preparation drugs, protein and other drugs, tea polyphenols are easy to react with iron and precipitate, so it is not appropriate to use tea to give drugs, so as not to affect the curative effect. Some Chinese herbal medicines, such as Herba Ephedrae, Ramulus Uncariae cum Uncis, Rhizoma Coptidis, etc., should not be mixed with tea. It is generally believed that it is not advisable to drink tea within 2 hours after taking the medicine.
When taking some vitamin drugs, tea has no effect on the efficacy, because tea polyphenols in tea can promote the accumulation and absorption of vitamin C in the human body. At the same time, tea itself contains a variety of vitamins. Tea itself also has the functions of excitement, diuresis, blood lipid reduction and blood sugar reduction, which can improve the efficacy of the human body and restore health. In addition, people often think that it is not appropriate to drink tea when taking tonic such as ginseng antler, which is also reasonable.
10. Anemia patients should avoid drinking tea.
Tannic acid in tea can combine with iron to form insoluble final compounds, so that the body can not get enough iron source, so anemia patients should not drink tea.
1 1. Patients with urinary calculi should avoid drinking tea.
Urinary calculi are usually calcium oxalate stones. Because tea contains oxalic acid, it will form stones with calcium excreted in urine. Patients with urinary calculi will get worse if they drink a lot of tea.