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What are the advantages and disadvantages of drinking tea
The World Health Organization has investigated the advantages and disadvantages of beverages in many countries, and finally concluded that tea is the best beverage for the elderly. According to scientific research, tea contains protein, fat, more than 10 kinds of vitamins, and tea polyphenols, caffeine, and lipopolysaccharide nearly 300 kinds of components, with the regulation of physiological function, play a multi-faceted health care and pharmacological effects.

Because of the tea has to prevent the human body within the steroid elevation, there is a role in the prevention of myocardial infarction, tea polyphenols can also remove excessive free radicals in the body, inhibit and kill to pathogenic bacteria. In addition, tea has a refreshing, eliminate fatigue, antibacterial effect. This is needed for middle-aged people. O*** body It can also purify the water and reduce the harm of radioactive substances on the human body. Therefore, in the current situation of serious pollution of the natural environment, especially people living in the city, should often drink some tea. Drinking tea has many benefits, summarized in 14:

(1) tea can make people refreshed, enhance thinking and memory skills.

(2) Tea can eliminate fatigue, promote metabolism, and have to maintain the heart, blood vessels, gastrointestinal and other normal functions.

(3) Drinking tea has great benefits for the prevention of dental caries. According to a survey in Britain, children often drink tea caries can be reduced by 60%.

(4) Tea contains a number of beneficial trace elements.

(5) Tea has inhibited the role of malignant tumors, drinking tea can significantly inhibit the growth of cancer cells.

(6) Drinking tea can inhibit cellular aging, so that people live longer. Tea's anti-aging effect is more than 18 times that of vitamin E.

(7) Drinking tea has delayed and prevented the formation of lipid plaques in the inner lining of blood vessels, preventing atherosclerosis, hypertension and cerebral thrombosis.

(8) Drinking tea can stimulate the central nervous system and enhance the ability to exercise.

(9) Drinking tea has a good effect on weight loss and beauty, especially oolong tea, which is particularly effective.

(10) Drinking tea can prevent senile cataract.

(11) Tea contains ellagic acid can kill a variety of bacteria, so it can prevent stomatitis, pharyngitis, as well as easy to occur in summer enteritis, dysentery and so on.

(12) Tea can protect the human hematopoietic function. Tea contains anti-radiation substances, tea while watching TV, can reduce the harm of TV radiation, and can protect eyesight.

(13) Drinking tea can maintain the normal acid-base balance of the blood. Tea contains caffeine, theophylline, theobromine, xanthine and other alkaloid substances, is an excellent alkaline beverage. Tea can be rapidly absorbed and oxidized within the ti, producing a higher concentration of alkaline metabolites, which can promptly neutralize the acidic metabolites in the blood.

(14) Prevention of heatstroke and cooling. After drinking hot tea for 9 minutes, the skin temperature drops 1-2 degrees Celsius, making people feel cool and dry, while the skin temperature drop is not obvious after drinking cold drinks.

Reasonable tea drinking is beneficial to the human body, but if it is not reasonable then it is harmful to the human body.

Drinking tea depends on the constitution Chinese medicine believes that the human constitution has a hot and dry, the difference between cold and tea after different production processes also have cool and warm points, so the constitution is different drinking tea also have to pay attention to. People with hot and dry constitution should drink cool tea, cold constitution, should drink warm tea.

The best thing to drink at night is black tea. Because green tea is unfermented tea, tea polyphenol content is higher, and maintains its original nature, stimulation is relatively strong; black tea is fully fermented tea, tea polyphenol content, although less, but after the "ripening" process, stimulation is weak, more gentle and mild, suitable for evening drinking. Especially for people with weak spleen and stomach, drinking black tea with a little milk, can play a certain role in warming the stomach.

However, people who are usually easily agitated or sensitive, have poor sleep and are physically weak, should drink less or no tea at night. In addition, when drinking tea at night, you should put less tea leaves, do not make the tea too strong. Tea time is best after dinner, because drinking tea on an empty stomach will hurt the body, especially for infrequent tea drinkers, will inhibit gastric secretion, impede digestion, and cause serious palpitations, headaches and other "tea drunkenness" phenomenon.

Drinking tea eight misunderstandings

One, like to drink new tea

Since the new tea storage time is short, containing more unoxidized polyphenols, aldehydes and alcohols and other substances, the human gastrointestinal mucosa has a strong stimulating effect on the stomach and intestinal mucosa, prone to gastric disorders. So the new tea should drink less, less than half a month of storage of new tea should avoid drinking.

Two, drink the first tea

Because of the tea in the cultivation and processing of pesticides and other harmful substances contamination, there is always a certain amount of residue on the surface of the tea, so the first tea has a detergent effect should be discarded not to drink.

Three, drinking tea on an empty stomach

Drinking tea on an empty stomach can dilute gastric juices, reduce digestive function, plus water absorption rate is high, resulting in a large number of undesirable components of tea into the bloodstream, triggering dizziness, panic, weakness and other symptoms.

Four, drink tea after meals

Tea contains a large amount of tannins, tannins can react with the iron in the food, generating new substances that are difficult to dissolve, a long time to cause iron deficiency in the body, and even induce anemia. The correct method is: one hour after the meal and then drink tea.

Fifth, drinking tea with fever

Tea contains theophylline, the role of elevated body temperature, fever patients drink tea is tantamount to "pouring oil on the fire".

Six, ulcer patients drink tea

The caffeine in tea can promote gastric acid secretion, increase the concentration of gastric acid, induced ulcers and even perforation.

Seven, drinking tea during menstruation

Drinking tea during menstruation, especially strong tea, can induce or aggravate menstrual syndrome. Medical experts found that, compared with those who do not drink tea, have the habit of drinking tea 2.4 times more likely to occur menstrual tension, more than 4 cups of tea a day, an increase of 3 times.

Eight, set in stone

The climate is different in all seasons of the year, and it is appropriate to adjust the type of tea to drink accordingly. Spring is appropriate to drink flower tea, flower tea can emit a winter stagnation in the body of the cold, promote the human body yang qi hair; summer is appropriate to drink green tea, green tea, bitter cold, can clear heat, heat, detoxification, enhance gastrointestinal function, promote digestion, prevent diarrhea, skin sores infection; autumn is appropriate to drink green tea, green tea is not cold and not hot, can completely eliminate the body's residual heat to restore the taste of the sweet nature of the warmth, so that the person is clear and refreshed; winter is appropriate to drink black tea, black tea The black tea is sweet and warm, rich in protein, and has a certain tonic function.

The correct way to brew green tea

1. When brewing green tea, the temperature of the water is controlled at about 80 ℃ ~ 90 ℃. If you are brewing green tea powder, warm water at about 40℃ to 60℃ is sufficient. The serving size is 2 grams of green tea powder with 450cc of water.

2. Don't drink the first brew of the tea, just shake it after brewing the hot water and pour it out.

3. Brewed tea should be drunk within 30 minutes to 60 minutes, otherwise the nutrients in the tea will become unstable.

4. Green tea powder should not be brewed too strong, otherwise it will affect the secretion of gastric juice, and it is best not to drink it on an empty stomach.

Tea scale hidden heavy metals timely cleaning is necessary

Related research suggests that the tea scale contains cadmium, lead, iron, arsenic, mercury and other heavy metal substances, when drinking tea, they will be brought into the body, and food proteins, fats and vitamins and other nutrients, generating insoluble precipitates, impede the absorption of nutrients. These oxides will also cause human neurological, digestive, urogenital and hematopoietic system lesions and dysfunction, especially arsenic, cadmium can cause cancer, causing fetal malformation. Therefore, all tea drinkers, should often wash the tea scale on the inner wall of the tea set in a timely manner.

Elderly people get up early to drink light tea

Some older people like to get up early a cup of strong tea, this habit of health in fact does not benefit. Because early morning drinking tea on an empty stomach, not only will cause gastrointestinal discomfort, loss of appetite, but also may damage the normal function of the nervous system. Elderly people drink tea early in the morning, you can pour the first course of tea, drink two courses of tea. If you can add a little sugar in the tea and the right amount of white chrysanthemum is better.