Health and pharmacodynamic effects of tea
Health and pharmacodynamic effects of tea , medicine in the country has long been discussed , but only clinical experience summary. For example , the Tang Dynasty “Herbal Supplements” said: . ” Various drugs for the drug for each disease , the tea as medicine of all diseases ,” pointed out the medicinal value of tea though , but why can tea cultivation , can heal , but not much theory. Even the famous poet Su Shi pointed out: ” why Wei Di a pill and make Lu with seven Bowl .” He advocated sick , no medication , just a cup of tea on the line. This is obviously also one-sided view , but not much convincing. How to correctly view and understanding of the health effects of tea and pharmacodynamic effects of it ?
In recent years , many modern medical researchers , health tea , medication effects , to explore in depth the theory , especially in the domestic tea industry experts study confirms the health effects and health effects of tea is due to tea contains more than chemical composition of the decision. In the main component of tea , there is a class of nutrients necessary for normal body ; Another ingredient although not a normal physiological need, but in some cases where the disease , restore health benefits for humans , known as drug active ingredient.
The medicinal ingredient in the following categories :
1 alkaloids . Tea contains alkaloids purine alkaloids , which include caffeine, theophylline , theobromine , glandular base , xanthine , 6 – amino purine mainly from the pharmacological effects of the caffeine, theophylline followed . Their main pharmacological effects are: ① stimulant , can be excited in the central nervous system , enhance the excitement of the process of the cerebral cortex , boost morale , enhance thinking . Thus helping to improve work efficiency. Spinal cord excitability can increase muscle strength , help reduce fatigue. ② diuretic effect. This action is done in collaboration caffeine and theophylline . Caffeine hand to promote the rate of urine filtered water through the kidneys , on the other hand to stimulate the bladder also have a diuretic effect . Theophylline is through the expansion of the renal microvasculature and inhibit tubular reabsorption of water into the sky diuretic effect . Therefore , because the tea for vomiting, diarrhea and other water-salt metabolism resulting imbalance or cardiogenic edema , premenstrual syndrome treatment , may receive certain effects. ③ relaxation of smooth muscle . The role of the strongest green tea , green tea , followed by tea weakest. ④ lowering cholesterol and preventing atherosclerosis effect. Soviet researchers confirmed that tea can change the status of patients with atherosclerosis . In short , the caffeine in tea and other ingredients, can be excited senior nerve center , so that the spirits , active thinking , eliminate fatigue.
2 polyphenols . Especially the catechin polyphenols , is an active substance , with enhanced vascular wall elasticity effect, while vitamin P and tea combined with enhanced vascular permeability effect, they are able to lower blood pressure and prevent blood vessel sclerosis. Even in the case of damaged blood vessels , as long as the eye 100-2 mg of polyphenols per month , you can make the ability to resist the tiny blood vessels in the auto recovery . The polyphenols with ascorbic acid was administered subcutaneously to mice , was found to reduce formaldehyde and inflammation caused by mucin enzyme . Some scholars have found that polyphenols can protect vitamin C oxidation . Currently, the tea extract has antioxidant for food , the effect is to increase the accumulation of liver, spleen, kidneys and intestines, brain , blood and other tissues of vitamin C to reduce catabolism and excretion of urinary vitamin C . Our study also shows : Different varieties of tea extracts taken different production methods , a variety of Shigella are inhibitory and bactericidal effect. And tea decoction of Shigella effect is better than traditional prescription bulbul soup and three yellow soup. It has been found that green tea brewed liquid typhoid , dysentery, paratyphoid, Staphylococcus aureus, Salmonella , cholera bacteria have antibacterial activity , but also on Pseudomonas aeruginosa and Proteus also kill. Polyphenols able antibacterial, mainly because it has a role in clotting proteins convergence , can be combined with the protein caused the bacterial cell death . Foreign scholars , radiation effects are the result of polyphenols and vitamin C synergy , because vitamin C itself has anticancer effects. In addition, polyphenols also has a role in promoting the biosynthesis of folic acid , so thyrotoxicosis caused by hyperthyroidism back to normal .
3 lipopolysaccharide . LPS is a combination of fat and polysaccharide macromolecular complexes, consisting of tea is an important component of the cell wall . The amount of lipopolysaccharide injection plant animal or human , in a short time can enhance the body ‘s non-specific immune function. Tea LPS , as well as the role of radiation damage , but also to improve the hematopoietic function , protect the blood results.
4 protein and amino acids . Green tea contains 16 to 24 kinds of amino acids, including cysteine , histidine system , theanine, valine , phenylalanine , leucine , isoleucine , wherein the specific tea theanine , accounting for half of the amino acid in tea . Essential amino acids the human body must , in almost all tea . Protein content in tea a lot, but can be dissolved in water less than 2% . Only add milk to make milk casein with polyphenols form complexes, tea can reduce convergence .
5 vitamins and minerals . This is the main nutrients in tea . , B, C, K, H, F and inositol main tea vitamin A, E, K and the like. Tea can be divided into water-soluble and fat-soluble vitamins . Water-soluble , such as vitamin C, P, B , etc., can be obtained from the tea . Tea -insoluble fat-soluble vitamins , such as A, D, E, K , etc., especially high levels of vitamin A, only the tea eaten, it is possible to obtain . Tea contains a lot of minerals. But over the tea and all kinds of tea, content ranging from quite different. Usually 4 to 7% , of which 50 % to 60% can be dissolved in water , can be absorbed and used . Elements needed by the body , in the vast majority of tea contain , so drinking is to get a good source of these elements , generally drink 5-6 cups of tea a day, some useful minerals to meet at least 5 to 7% , as much as to meet the 50%. In addition , tea contains more fluoride in drinking low-fluoride area , tea has great benefits for dental protection . Soviet scholars consider : Although tea iron, copper content is not high , but because of their remaining two components of blood and promote the formation of functional red blood cells and, therefore, in the treatment of anemia, the tea has a role. Tea sodium low, people suffering from high blood pressure , drinking tea is very beneficial.
6 . Carbohydrates and lipids . Tea contains about 30% carbohydrate so , however , can be dissolved in water , but 4-5 %. However, the tea can help , sugar, 6 cups of tea per port count , the heating energy consumption of a large quantity of about 7 to day 10% of the lipid content in tea for about 2 to 3% , mainly phospholipids, sulfatide , glycolipids and triglycerides . These lipids beneficial to humans , especially linoleic acid and linolenic acid, but little soluble in water, in order to get these substances , only the tea made directly to food consumption. The ancients had eaten our tea habits. “Clean barnyard class notes ” there reads: ” Xiang people in the tea , Bu Wei drink its juice, tea and chewing Noir and a guest to the people , will make tea , pour the pot if it ‘s to Bong off as disrespectful passengers . the lid to open bowl , cover all the tea has no Rufu carry . ”
7 aromatic compounds . Jasmine tea contains pigment , ionone and other aromatic substances, these substances hair dry weight accounted for 0.6% of the tea . After a meal with tea mouthwash , both to greasy , can the teeth , preventing bad breath.
By the sub- medicinal ingredients and more tea , so tea outside in addition to nourish the body , but also to promote the body ‘s ability to resist disease . According to the Tea Research Institute of Chinese Academy of Agricultural Sciences ‘ foreign tea dynamic ” published that tea can not only refreshing excitement crude urinary thirst , and can lower blood pressure, bactericidal anti-inflammatory to relieve radiation damage , prevent tooth decay , protect the internal organs, sterilization detoxification , prevent crown cor. The trace element selenium in tea have anti-cancer , anti-aging and the role of the protection of human immune function , as well as the role of the pancreas to prevent degradation of heavy metals such as lead and mercury poisoning prevention of . Selenium in the body is equal to the loss of a strong defense. Health effects of tea is the root cause, advocate drinking , is to improve the health of human beings fundamentally .