Positive impact of tea and its bioactive components on human health was most in detail described for the first time in 1906 in the treatise Kakuzo Okakura “the Book of Tea”. Summing up ancient historical beliefs about what tea – not just acceptable drink, Okakura writes: “In the beginning tea was medicine and only then turned into drink …”
Modern scientific research confirms what inhabitants of Asia for centuries trusted in: powerful antioxidants which prevent appearance of many diseases in fans of this drink contain green and black tea.
Researches showed that anti-oxidative action of flavonoids in black and green tea reduces risk of such diseases as a stroke, cancer, diabetes and also maintains health of an oral cavity.
Tea against heart diseases
Catechins in green tea and also teaflavina and tearubigina in black tea suppress oxidation of lipids and formation of blood plaques, reducing thereby cholesterol level. Also regular consumption of tea prevents sgushchivany blood which leads to a vein thrombosis.
Extractive substances of tea and also polyphenol to a certain level constrain a congestion of thrombocytes, reducing thus risk of thromboses. Both black, and green tea improve the endothelial function (narrowing and vasodilatation) necessary for control of pressure and forming of new blood vessels.
Tea against cancer
Set of laboratory researches showed that polyphenols in black and green tea neutralize carcinogens, reducing thereby risk to develop cancer. It is also proved that tea increases activity of enzymes which carry out an organism detoxication.
Tea fights against carcinogens thanks to the flavonoids which are available in it. Tests confirm that tea polyphenols reduce education and development of carcinogens. Therefore regular consumption of tea limits the speed of development of tumors and prevents risk of formation of new.
Tea and diabetes
At type 1 diabetes the pancreas does not develop enough insulin which regulates glucose level in blood. At the 2nd type of a cell of a liver and muscles do not acquire insulin to control glucose.
Tea against aging
It is considered that the diseases characteristic of advanced age arise because of the attack of an organism by free radicals. And here polyphenols which contain in tea reduce activity of such radicals. So tea promotes the best quality of life in old age and can even prolong it.
How many tea
Natural products of plant origin usually contain antioxidants, but in black and green tea their level is higher, than in fruit and vegetables. As a rule, two cups of tea contain amount of antioxidants equal to five portions of fruit or vegetables.
Scientists came to a conclusion that optimum amount of tea in day – 5-10 cups though there are no scientific confirmations that the use of bigger quantity can be harmful. But should treat tea carefully babies, children of younger age, pregnant, sick type 1 diabetes and also to the people accepting psychoactive substances or sensitive to caffeine. Also tea is not recommended by that whose food allowance is not balanced.
Drink on health!