The tea plant, Camellia Sinensis , has been cultivated for centuries in India and China, is one of the most popular beverages in the world .
It really is the most ancient medicinal plant cultivation, and in China, a real beginning of modern civilization. There are many varieties of tea, but there are mainly three types, green tea (not fermented), black tea (fermented), oolong tea (partially fermented).
Unlike other types of tea , green tea is made from leaves of the Camellia Sinensis plant, unfermented.What brings a higher content of beneficial substances. The active constituents are polyphenols , important antioxidant and free radical scavenger .
These polyphenols in green tea are called catechins.
The four most important are :
- epicatechin Galata
- Galata gallate EGCG
The latter the most active and important in the actions attributed to green tea.
They also contain alkaloids, caffeine, theobromine and theophylline. L – Theanine , an amino acid of green tea with calming and relaxing the nervous system.
They are known as the antioxidant properties of green tea, and most of these actions are due to catechins. Stimulants, diuretics, astringents , improves cardiovascular health.
Remove gases, regulate body temperature , blood sugar, improve digestion, improve mental processes. The polyphenols in green tea appear more active as antioxidants than vitamin C.
In Asia, most commonly consumed green tea, and these populations have significant longevity. Although some studies indicate that drinking green tea extract in capsules is more effective, and that to get the benefits of green tea health front you need to drink up to five cups of green tea, Japan recommended as beneficial amount .
He attributed many benefits, but we know that it is not a drug, but a natural product, which means that these benefits must meet with caution.
Some of the properties attributed to them is to prevent the disease of cancer, improved cardiovascular health, diabetes, obesity, Alzheimer ‘s, action against viral or bacterial infections, some neurological diseases.
It has anti- inflammatory action clearly, anti – thrombotic, lowers cholesterol.
Green tea extract protect cardiovascular (heart) health
Thanks to its high antioxidant capacity, the extract can act as an important free radical scavenger, particularly of oxygen reactive species that cause cell damage in cardiovascular disease .
Some studies support the protective properties on the health of the cardiovascular function. This is mainly in the oxidation of lipoproteins, vascular inflammation, cell proliferation in the blood vessels, platelet aggregation.
In cardiovascular diseases in which these processes are implicated (mentioned above), the polyphenols in green tea catechins have protective and antioxidant effects, including anti-inflammatory actions, anti-thrombogenic and lowering action of the effects of lipids in the vessels, while improving vascular tone.