When drinking tea, various components in tea react with saliva in the mouth, which makes the mouth moist, produces a cool feeling and has obvious thirst quenching effect. Organic acids and vitamin C in tea stimulate oral mucosa, promote saliva secretion, and produce the effect of promoting fluid production and quenching thirst.
2, diuretic detoxification
Caffeine, theobromine and theophylline in tea are all soluble in water. After being absorbed by drinking tea, it can relax renal blood vessels and enhance blood flow in the kidney, thus increasing the filtration rate of glomerulus. This is the truth of drinking tea and diuresis.
Tea polyphenols in tea can combine with heavy metals to produce precipitation, so that some harmful substances in the body can be quickly discharged from the body to achieve the effect of detoxification. Drinking tea can also promote the decomposition of alcohol and the excretion of alcohol from the body, so it has the effect of sobering up.
Smokers drink more tea. Tea polyphenols, vitamin C and other substances in tea can decompose toxic substances such as nicotine, so drinking tea can alleviate tobacco poisoning.
3, Yisi refreshing
There are about1400 million nerve cells in the human brain. The activity function of brain cells is maintained by sugar and oxygen, and its energy source is ATP (adenosine triphosphate), and the raw material of ATP is AMP (adenosine monophosphate). Caffeine can increase the content of AMP, thus increasing the raw materials for ATP synthesis, making brain cells full of vitality and vigorous exercise. Therefore, drinking tea can eliminate fatigue and promote the activity of cerebral cortex. In addition, human fatigue is caused by a large amount of lactic acid produced in the body, which leads to muscle soreness and hardening, and reduces the activity and thinking ability of brain cells. The diuretic effect of drinking tea will accelerate the excretion of lactic acid, so it can eliminate fatigue.
4. Strengthen teeth and prevent dental caries
Drinking tea can increase the absorption of fluoride and strengthen the enamel layer of teeth. Tea polyphenols in tea can kill oral bacteria and reduce the incidence of dental caries. Tea polyphenols can also inhibit the activity of glucose transferase, weaken the attachment of dental caries bacteria to teeth, and reduce the occurrence of dental caries.
5. Enhance immunity
Lipopolysaccharides and polyphenols in tea can enhance human immune function. In addition, drinking tea can kill harmful bacteria in the intestine and activate and protect beneficial microorganisms in the intestine. Drinking tea can increase the number and activity of white blood cells and lymphocytes, promote the formation of intercellular substances in spleen cells, and thus enhance human immune function.
6, delay aging
An important reason for human aging is the production of excessive free radicals. As a strong oxidant, this high-energy and high-activity substance makes fatty acids in the human body produce peroxidation, destroys biological macromolecules and cell walls, and causes cells to age rapidly, resulting in human aging. Tea polyphenols in tea can effectively remove excess free radicals and prevent the peroxidation of fatty acids, so drinking tea can delay aging.
7, sterilization and antivirus
Generally, tea soup can kill bacteria within 20 hours, typhoid and dysentery bacteria within 8~ 1 1 hour and cholera bacteria within 2 hours. At present, it is known that tea polyphenols in tea can kill Staphylococcus aureus and Bacillus cereus. In addition, it also has a strong inhibitory effect on many pathogenic fungi. Treating rotten feet and psoriasis with tea has a certain effect. Tea also has inhibitory effect on some viruses, and drinking tea often has certain inhibitory effect on viral colds and viral diarrhea.
8. Reduce fat and lose weight
Drinking tea can reduce blood lipid and cholesterol, which is the same conclusion of many clinical observations. Caffeine in tea can promote the decomposition of fat and increase the secretion of gastric acid and digestive juice; Tea polyphenols in tea can prevent the accumulation of sterols and neutral fats in blood and liver; Chlorophyll in tea can inhibit the absorption of cholesterol in gastrointestinal tract. These factors, * * * have played a role in dissolving fat, reducing blood lipid and preventing obesity.
9. Lowering blood pressure and preventing cardiovascular diseases
Hypertension is mental stress and mood fluctuation caused by environmental or internal factors, which makes angiotensin I in the liver become angiotensin I, which is inactive and will not lead to an increase in blood pressure. Only when angiotensin I becomes angiotensin II will it cause hypertension. This change is completed by an angiotensin converting enzyme, and tea polyphenols in tea can inhibit this converting enzyme. The treated tea contains a large amount of ν-aminobutyric acid, which can also inhibit the occurrence of hypertension. In addition, drinking tea can reduce blood fat, anticoagulation and prevent arteriosclerosis, which is also an important reason for preventing hypertension.
10, deodorizing to aid digestion
Bad breath is caused by the formation of methyl mercaptan compounds from food residues under the action of enzymes. Tea soup can inhibit the activity of this enzyme and play a role in eliminating bad breath. Drinking tea can stimulate the secretion of more digestive juice, contribute to the decomposition of starch, protein and fat, and help digestion.
1 1, lowering blood sugar and preventing diabetes.
Polyphenols, vitamin C and polysaccharides in tea can maintain the normal toughness and permeability of human microvessels, and also have the function of regulating human glucose metabolism. For example, catechin has obvious inhibitory effect on α -amylase and sucrase, thus achieving the purpose of lowering blood sugar.
12, improving eyesight and treating eye diseases
Vitamin B 1 in tea can maintain the function of optic nerve, vitamin B2 is an essential active ingredient to maintain the normal function of retina, and vitamin C is an important nutrient for human eyeball lens. Therefore, drinking more tea is definitely good for eye health.
13, clearing liver and protecting liver
Tea polyphenols in tea can prevent the accumulation of cholesterol and neutral fat in blood and liver, which has a great effect on clearing liver. Catechin can inhibit hepatitis virus, so drinking tea is also an effective way to prevent hepatitis.
14, prevention of scurvy
Scurvy is caused by the lack of vitamin C. Tea, especially high-grade green tea, is rich in vitamin C. Regular drinking of tea can prevent scurvy.
15, radiation resistance
One of the injuries caused by radiation is to destroy hematopoietic function and reduce the number of white blood cells in the blood. Radiotherapy for cancer patients is often unable to continue because of the serious decline of white blood cells and the destruction of immune function. Tea polyphenols, lipopolysaccharide and vitamin C in tea can improve the immune function of the body and effectively increase the number of white blood cells. Therefore, the anti-radiation effect of tea is obvious. The prevention of radiation hazards such as taking X-rays and watching TV in modern society deserves attention, and drinking more tea is a good way.
16, antiallergic
Modern industry is developed, industrial pollution is also serious, pollutant allergy is more common, and many people are allergic to pollen and seafood. When foreign bodies enter the human respiratory tract, it will produce an immune response and release histamine at the same time. Histamine can increase capillary permeability and cause smooth muscle contraction, so bullous allergic symptoms will appear on the skin. The function of antiallergic drugs is to prevent the release of histamine. Tea has an obvious effect on preventing histamine release, and sometimes the inhibition rate can reach more than 90%. Therefore, it is a preventive method for people with allergic history to drink more tea.
17, anti-ulcer
Gastrointestinal ulcer is caused by the imbalance between the digestive function of pepsin and the defensive function of gastric mucosa. Catechins in tea can inhibit the digestion of pepsin, enhance the defense of gastric mucosa and inhibit the reproduction of harmful bacteria. Due to the comprehensive effect, it achieves the purpose of anti-ulcer.
18, intelligence, conducive to physical and mental health.
As the saying goes, "tea can clear the heart", and one of the functions of drinking tea is to regulate the spirit. It is the virtue of China people to take tea as a friend, to respect guests with tea, and to value harmony. Tea can keep the function of brain cells in a normal state and make the oxygen supply to cerebral vessels normal. Therefore, ancient literati, whether painting or writing poems, never left the pot or tea, and drank tea to improve their intelligence, promote their thinking and clear their heads. Yu Ruomu, a nutritionist in China, thinks why China people are smarter than foreigners, and their IQ is generally higher. She thinks this is because China has a long history of drinking tea.
19, treating diarrhea and constipation.
Drinking tea can regulate intestinal peristalsis, inhibit harmful bacteria in gastrointestinal tract, protect beneficial microorganisms and maintain normal digestion and absorption function, so it can improve digestive function of digestive tract. Tea polyphenols in tea also have bacteriostatic effect, so it has therapeutic effect on diarrhea caused by bacillary dysentery.
20. Anti-cancer and anti-mutation
It is found that the anti-cancer effect of tea can not be ignored. Many medical research institutions at home and abroad have carried out various in vitro and simulated anti-cancer experiments with tea, tea extract, tea polyphenols and various catechin monomers, and achieved good results. Epidemiological investigation also proves that the incidence of cancer is low in areas where drinking tea is more common.
These are some important achievements of tea drinking and health research in recent years. It is believed that with the development of science, the research on the health care and pharmacological effects of tea will be further deepened.