Green tea is the remarkable drink having refined taste and a fine aroma. However it is famous not only special gustatory qualities, but also the ability to have the revitalizing and rejuvenating effect.
Health giving qualities of a green tea are explained by a large amount of the chemicals and organic compounds which are its part. Leaves of a green tea contain about 500 various minerals (phosphorus, fluorine, calcium, iodine, magnesium, manganese, copper, etc.) and practically all groups of vitamins. However, at tea brewing not all useful components but only those that are dissolved in water get to a cup. Besides, in the tea leaves the percent of content of substances, important for health, decreases over time therefore old and low-quality tea can not have any health giving qualities at all. And here the fresh and correctly made drink is the real elixir of youth and health. What does it include?
Alkaloids
Caffeine is considered the main tea alkaloid. In connection with tannin it forms new substance (theine) which, influencing the central nervous system, increases mood and stimulates mental activity. Besides, theine improves blood formation function, promotes strengthening of bones and tendons and also ensures trouble-free operation of a thyroid gland. It is completely removed from an organism therefore even at frequent consumption of green tea the risk of poisoning with caffeine is excluded.
The insignificant quantity in a green tea contains also other alkaloids. For example, it is the soluble theophylline and theobromine in water having diuretic and vasodilating properties, almost insoluble адеин and absolutely insoluble guanine in water. It is possible to bring this substance out of a tea leaf in infusion only by long warming up of tea solution or its sharp boiling.
Tannins
Basis of any tea solution is tannin – substance which has multipurpose effect on various systems of an organism. So, tannin in connection with caffeine and teakakheina promotes lowering of blood pressure and strengthening of capillaries, enhances activity of vitamin C and stabilizes production of collagen in vascular walls. Besides, the tannin which is contained in a green tea is a main supplier of vitamin P.
Proteins and amino acids
17 amino acids including such necessary for health of a human body as glyutaminovy acid are a part of a green tea. She strengthens work of a brain and is to important components for ensuring work of nervous system and its recovering from stresses.
Infusion of a green tea is also protein-rich which on the structure and quality don't concede to the proteins which are contained in bean cultures at all.
Minerals
Mineral substances in a large number contain as in fresh tea leaves, and already in finished goods. Micro and the macrocells which are a part of a tea liquor provide normal functioning of all systems of an organism. So, for example, the lack of zinc can lead to easing of immunity and deterioration in a condition of hair and nails. A green tea at the correct use is capable to solve this problem.
Vitamins
At a green tea in any given quantity there are practically all groups of vitamins. This drink – an important source of vitamin P (routine) which promotes accumulation and deduction in vitamin C organism strengthens walls of capillaries and vessels and also possesses anti-sclerous action.
In fresh tea leaves of vitamin C contains nearly 4 times more, than in fresh orange or lemon juice, however in the course of a zavarivaniye a considerable part of vitamin is lost, but the remained quantity meets standard daily rate necessary for the person. Vitamin C is a powerful antioxidant which neutralizes the destroying action of free radicals and slows down aging process.
Amount of vitamin A in a green tea approximately same, as in carrots or pineapple. Vitamin A is necessary for maintenance of elasticity of walls of blood vessels and prevention of emergence of vascular plaques. At the sufficient level of content of this vitamin B an organism, skin looks smooth and healthy.
Green tea is an irreplaceable source of vitamins of group B, they completely pass into a tea liquor and are acquired in an organism in the course of the tea drinking. It is especially important if to consider that the human body doesn't accumulate vitamin B and needs its constant replenishment. This vitamin is necessary for normal work of a liver and "is responsible" for good condition of hair and integuments.
Thus, a green tea is not only tasty, but also very useful drink which at the correct preparation and the moderate use promotes improvement of the general health and external data.