Useful properties of tea

Beneficial properties of tea
Tea is a unique concentrate valuable delicious, diet and drugs. Along with alkaloids (caffeine, theobromine, and theophylline), which give the drink the stimulating property to the tea leaves contain valuable biological substances - tannin, various vitamins, minerals, essential oils, and soluble nitrogen compounds all essential amino acids. There are many different phenolic compounds that give the beverage its unique healing properties. To a greater or lesser extent, they are stored in the finished tea together with other compounds useful in the correct welding pass into the infusion, while the ballast and harmful substances remain undissolved tea. Modern science is fully confirmed by the ancient Chinese saying that tea has a positive effect on the digestive, circulatory and nervous systems.
The classic works of IP Pavlov was proved that the substances contained in tea, tone the central nervous system, strengthen heart function, stimulate gastric secretion. Important information about tea enriched science, many biochemists, scientists, technologists, physiologists and physicians, such as AN Bach and AI Oparin, AL Kursanov, MN Zaprometov, MA Bokuchava And . A. Khocholava, KM Dzhemuhadze, Neville, Ukers, Mann, Bredfild and many others. Through the efforts of chemists and biochemists are now almost completely deciphered and scientifically proved useful features tea. No drink has such a rich complex of biologically valuable medicinal qualities. Curative and preventive effect of tea makes it one of the most important tools in modern medicine. Juice of fresh leaves, decoction, tincture or extract of different varieties and types of tea are used in various pathologies. Tea is an excellent tool kapillyaroukreplyayuschee because it contained various vitamins and complex catechins that have vitamin properties. Therefore, it is used in diseases associated with increased permeability of the capillaries, such as hemorrhagic diathesis, an inflammation of the capillaries, and all kinds of capillary bleeding, external and internal hemorrhages, in scurvy, nephritis, haematuria (acute nephritis), as well as atherosclerosis, hypertension, dysentery, typhoid fever , measles, whooping cough, scrofula, rheumatism, rheumatic endocarditis and other heart disease (eg, angina), chronic hepatitis B, polio, influenza, gastric ulcer and duodenal ulcer (yellow, white tea), the stones of the liver and kidney, for the prevention of diseases lymph glands, gout and accumulation of salts, colds and inflammatory diseases of the respiratory, trophic ulcers, certain skin diseases, radiation sickness, sunstroke, burns quartz, some nervous diseases.
Tea strengthens the nervous system and dissipates sleepiness, useful both during the day and at night work, improves vision, helps a person to focus, has a diuretic, anti-toxic effect, increases the overall tone of the body. Particular note must be three main groups of the chemical composition of tea, which determine the main advantages of the drink and its healing properties: a group of tea leaf alkaloids (caffeine, theobromine and theophylline); a group of phenolic compounds, among which the most important are the tannins and catechins; group of oils consisting of more than 130 compounds.
Among the alkaloids tea plays a major role of caffeine, which is a derivative of xanthine bodies - the decay products of the nucleic acids. It has on the human variety of effects, but it is most pronounced effect on the central nervous system, muscle (including cardiac muscle), and kidney. It has a tonic, invigorating properties, improves blood circulation and breathing, improves mental activity, enhances brain vessels.
Effects of caffeine on the central nervous system is its impact on brain centers associated with higher mental functions. As a result, there is a general increase in the coordinated functions of the brain. In this connection, in addition to waking caffeine causes an increase in mental alertness, and increased sensitivity mental associations. Research carried out by Pavlov and his followers have shown that under the influence of caffeine excitation processes predominate over the braking process. In this case braking processes are not suppressed, but only a few are weakened. When fatigued, when they begin to dominate the processes of inhibition, caffeine levels the ratio between excitation and inhibition, and normalizes the activity of the nervous system. In some people there is a false belief that caffeine, which is found in strong tea, allegedly harmful to the heart. In fact, a strong infusion of tea consumption not only causes the heart not the slightest harm, but on the contrary, stimulates its work.
Thus, the above average 200 ml infusion contains 0.04 grams of caffeine, and the maximum allowable daily intake for the human body is 0.25 g And you need to consider the fact that the tea made in the proportion of 3 g of dry tea per 125 ml of water, the first time infusion contains 0.9 Grand caffeine (equal to 1 grand prix 0.06 g), the second - 0.32, while the third and subsequent - does not contain it at all. Under the influence of caffeine muscle contractions intensified and become more rapid and complete muscle blood vessels (including coronary and kidney) extend. This helps to increase endurance and muscular disability. Caffeine, affecting the redistribution of blood in the body, improves metabolism, stimulates tissue respiration, which affects the activity of the brain and kidneys.
Theophylline and theobromine tea as caffeine, act on the central nervous system, but weaker. They improve blood circulation, has antispasmodic and vasodilating effects, beneficial effect on coronary vessels of the heart, increasing the excretion of urine due to the impact on the renal epithelium and renal capillaries. The whole complex is extremely valuable properties of tea fenolnye give compounds in which the tannin is included as one of the factions. It is known that tannin plays a special role in the formation of taste. Oxidize during the fermentation process, it also affects the infusion of color and complements the flavor of the tea. Tannin and shows their most important medicinal properties: it strengthens the walls of blood vessels, detrimental effect on pathogens of intestinal infections (dysentery, paratyphoid and other microbes). Catechins in many respects superior to those properties which are famous tannins. They have strongly pronounced P-vitamin properties and are able to increase the deposition of vitamin C, to delay its excretion from the body. Due to this they strengthen gums, protecting them from scurvy disease.
By facilitating the absorption of vitamin C, and acting with them together, tea catechins strengthens blood vessels, reducing the chance of bleeding, have a therapeutic effect in inflammation of the capillaries, kapillyarotoksikoz, inflammation of the kidney, colitis, acute rheumatism, polio. Derivative catechins used in violation of capillary permeability, edema treatment of vascular origin, nephritis, bleeding disorders, migraines and some forms of hypertension. Currently unknown substance, which would have greater kapillyaroukreplyayuschee activity than tea catechins. When processing leaf tea catechins are oxidized, so vitamin P content in black tea is seven times lower than in the green sheet. The oxidation of catechins ortohinony obtained which also have high chemical activity.
They possess antimicrobial properties, exerting a toxic effect on pathogenic microorganisms. So, tea decoction successfully treat patients with dysentery, it is used as an anti-toxic remedy for such infectious diseases as measles, whooping cough, influenza and others. Due to the content in tea catechins it exhibits therapeutic properties in the treatment of acute nephritis, tinnitus, headaches (at acceptance of catechins to 150 mg per day) is used to prevent capillary fragility citizens in northern areas due to the low consumption of food fortified vegetable and antibiotics in the treatment of dysbacteriosis prevention purposes.
Tannin and tea catechins have antioxidant and a complex-forming properties. The antioxidant properties help to protect the body from radiation sickness arising from the X-ray irradiation from sunstroke, burns and quartz t. D. Complexing ability of tannin and catechin tea, as shown by Japanese scientists, it makes the binding of harmful isotopes such as strontium-90. Essential oils of tea create a unique "bouquet", giving the favorite drink peculiar smell and participating in the creation of unique taste. They are formed mainly in the processing of tea leaves, increasing its concentration as a result of oxidative processes in the withering and fermentation stages. The composition of complex esters include whole tea gamma acid - acetic, propionic, butyric, valeric, caproic, palminovaya, salicylic, and alcohols - hexyl, The benzene, phenylethyl. The presence of these volatile substances as harmful at high concentrations in the tea infusion is minimal and balanced manner that promotes soft impact on the human body. Their effect is not fully understood, but it is known that in the same way as caffeine, they have some exciting, invigorating properties, activating the brain. It is noteworthy to human health vitamins, micro-and macro tea. Tea contains vitamin P, C, Bi, B2, K, U, PP, A, E, and others. The high content of tea polyphenol compounds has a high P vitamin activity. They are present in all kinds of tea, but in different concentrations. From microelements tea it is of particular importance fluorine. If tea catechins strengthen gums, the fluoride strengthens tooth enamel, so it is advisable to regularly clean the teeth splicing tea. The effect on the human body the most important chemical composition of tea components to evaluate its place among other restorative products. It should be noted that the impact action favorably coffee, beer and alcoholic beverages.
For example, alcohol, first over-exciting the nervous system, through the short period of time it oppresses; tea is a tonic effect of the CNS (central nervous system) without further oppression. It is known that at least a strong tea caffeine than coffee, tea but it is combined with the catechins and tannins as well as in the form of compounds Tanata caffeine thereby acts softer. The famous French physiologist Molishot, comparing the effect of tea and coffee, noted that tea is less than excites the imagination and makes it possible to better perform mental work with great calm and concentration, without causing this strain of thought, which is coffee.
This can be explained by the fact that the caffeine in coffee (which lacks Tanino-catechin complex) acts more directly to the heart, while the tea caffeine acts mainly on the vessels of the brain and central nervous system. To summarize briefly about the properties of tea, you can say the following: It has a tart taste and delicate flavor. It has stimulant properties due to the action of caffeine and other alkaloids. Infusion of tea strengthens the central nervous system effects and enables a person to active thinking, it contributes to a more calm and careful implementation of mental and physical work. Positive effect on the functional state of external respiration, cardiovascular and hematopoietic systems, regulates water-salt and vitamin C metabolism, increases vitality in man. It improves heart function, increasing heart muscle and blood vessel system, regulates blood pressure, helps in the treatment of hypertension, atherosclerosis. Infusion of tea due to the regulatory impact on the nervous system helps to reduce inflammatory activity. Used for the treatment of alcoholism. Unlike alcohol excitement caused by the infusion technique, it does not end with depression.
It is used as a dietary means, quenches thirst, regulates heat. Due to the high content of various vitamins tea is used to prevent premature aging of the organism. Green tea has antiscorbutic properties, because it contains twice as much vitamin C than black. Phenolic compounds tea, consisting mainly of catechins have high P-vitamin and enhances the properties of elasticity and strength of blood capillaries, affecting their resistance to possess antitumor activity.
The highest P vitamin activity green tea is characterized as phenolic compounds soluble therein is much higher than in other types of tea (1 g of green tea catechins in quality content is from 80 to 170 mg, and in black - 3.4 mg ). It is a preventive and therapeutic agent from the influence of harmful isotopes. Japanese scientists have shown that regular use of green tea to avoid radiation sickness. They found: phenolic compounds in green tea are able to absorb radioactive strontium-90 that occurs before it reaches the bone marrow. Tea, especially green, has anti-microbial properties, protects the human body from harmful development microflora used in the treatment of intestinal infections.
I would also like to remind those cases where the use of tea just need to:
very strong and sweet hot tea with milk - an antidote for poisoning by alcohol, medicinal drugs;
warm tea of ​​average tea leaves with lemon, black pepper and honey - a diuretic and diaphoretic for colds the respiratory tract and lungs;
strong infusion of chilled mixture of green and black tea with the addition of a small amount of grape dry wine (.. 1 teaspoon to 1 cup) - eyewash in inflammatory processes century clogged mucous membrane, as well as conjunctivitis;
Juice Fresh tea leaves or tea extract triturated dry tea can provide a means for burns;
Chewing dry green tea is very good for nausea and severe retching in pregnant women, with motion sickness in cars and seasickness;
strong infusion of green tea with the systematic use is used to treat external ulcer disease. This is an incomplete list of advantages wonderful drink immediately induces a cup of fragrant tea. However, we must remember that before starting any treatment is advisable to consult a doctor, which, depending on the severity of the disease and the patient's condition will help you choose a specific treatment regimen, as some kinds of tea there are restrictions (see. P. 206-212).