Green tea harm or benefit
The birthplace of green tea, according to many researchers, is China. In culture it was introduced in II-III centuries A. D. In Russia green tea appeared in 1638 to Four pounds outlandish dried sheet was brought from Mongolia as a gift from Altyn-Khan Russian Tsar Mikhail Fyodorovich Ambassador Vasily Starkov. In 1679, an agreement was signed with China for the supply of tea, and since then Russia has become a tradition the custom of drinking tea. In 1833 the first tea plantation was established in the Crimea, and in 1847 – near Batumi. The Republic of Belarus tea imports.
The tea plant in the world is cultivated for its leaves. And collect only the young, only blossoming. The most valuable young shoots with 2-3 leaves and unopened buds.
Green tea contains 40-50% extractives, essential components of which – xantinove alkaloids, caffeine, theobromine and theophylline.
Caffeine has a stimulating effect on the Central nervous system, improves functions of the senses, increases motor activity, mental and physical performance, reduce fatigue and drowsiness, stimulates the vasomotor center.
Theobromine stimulates the heart, dilates coronary vessels, relaxes the muscles of the bronchi and has a diuretic effect. Unlike caffeine causes a less pronounced effect on the Central nervous system.
Theophylline the action close to the theobromine, but has a more strong diuretic effect.
Green tea is rich in tannins, which content is 15-30% – several times higher than black tea. They include catechins with antioxidant, capillary, antimicrobial and antidiarrheal properties. Catechins protect the body from intracellular auto-oxidation of fat and tissue and the formation of the highly reactive peroxides, which not only inhibit cell functions, but can cause their death. It is established that catechins prevent the development of atherosclerosis and reduce hyperthyroidism.
The green tea contains 16-25% of proteins, about 6.5% of carbohydrates, and 4.5% fiber, 2-3% of pectin, a 5.5% ash. The mineral composition is represented by the salts of potassium, phosphorus, calcium, magnesium, iron, manganese, copper, fluoride.
Tea found a large amount of vitamins – B1, B2, B15, P, PP, K, C, provitamin A. Vitamin B15 (pangalawa acid) prevents vascular sclerosis, asphyxia of the tissues, has a lipotropic effect. The main function pangamovoy acid is involved in the biosynthesis of choline, methionine, creatine, epinephrine, sterols, steroid hormones.
A specific flavor of tea give the essential oils, the amount of which reaches 1%.
Thanks to a combination of substances stimulating effect of tea develops gradually, and after the cessation of effect CNS depression occurs, as happens when drinking coffee.
The doctors of the ancient East encouraged to use tea for edema, obesity, gout, kidney stones, poisoning drugs.
Green tea can stimulate the blood, increasing the hemoglobin content in the blood, contributes to the prevention of caries.
Tea is used for colds. In this case, it is customary to add honey – 1 tsp per Cup. Instead of honey you can add raspberry jam.
Japanese scientists have found that tea has on the body therapeutic effect in radiation sickness. Monitoring of patients who have suffered at explosion of the atomic bomb in Hiroshima, showed that those who went to tea growing district of Udzhi and drink lots of green tea, not only survived, but much easier and suffered radiation sickness. Scientists believe that this effect is associated with the presence of catechins.
Due to the fact that it binds proteins and salts of heavy metals, tea is used for gastritis, poisoning toxins. Green tea has a more pronounced bactericidal properties than black.
Tea, like all food, drugs, has a limit in use. Caffeine, theobromine and theophylline in high concentrations is harmful enough. Therefore consumption of green tea for an adult – no more than 4 cups (glasses) per day – based welding 1 tbsp per Cup of boiling water somewhat cold, but not boiling.
Cold welding is good to use for fertilizing flowers and seedlings of vegetable plants for growing seedlings.