Tea Flavonoids: Rich in Antioxidants

Flavonoids are the naturally found polyphenol antioxidants in the plants also known as bio-flavonoids. They are the compounds present in the plants, not directly linked with the development of the plant. Thus, flavonoids are the nutrients that are beneficial for mankind, which can be obtained from the plants by consuming fruits and vegetables as they secure human being from certain diseases like reducing the risk of certain cancers, age-related degenerative diseases, and heart disease.

Flavonoids can be classified as flavonoids, iso-flavonoids and neo-flavonoids. Flavonoids are in plant food and are extensively available through them. Most of the flavonoids have sugar content in them though tea’s catechins are deprived of this feature. 7–15 mg theaflavins, 24–40 mg catechins, ∼85 mg thearubigins, and 8–15 mg flavonols plus flavones, collectively amount to 166–193 mg flavonoids per cup, are included in a usual cup of tea (200 ml). During the process of tea making, certain ‘derived polyphenols’ are generated in the form of yellow, brown and red pigments, which are difficult to be analyzed. In this way, one consumes 100 to 200 mg per capita daily of polyphenols and phenols.

The polyphenols, flavonoids and catechins found in tea are reactive to oxygen and act as antioxidants according to the arrangements and number of the group of phenolic hydroxyls. 80-90% catechins and flavonols — less than 10% of total flavonoid are found in polyphenolic flavonoids of green tea which produce certain complex condensed products during preparing black tea. Black tea contains catechin content only 20–30%, at the same time 50–60% and 10 % of total flavonoids are the thearubigins and theaflavins, which are basically imaginary. Thus, the dihydroxybenzyl ring and their capability to delocalize free electrons control the tea polyphenols to be reduced.

The flavonoids present in tea act as anti-oxidants to help in maintaining cholesterol level to defend ones heart from heart attacks and damages due to smoking. The researchers are researching on the flavonoids of tea as they are the good source of anti-oxidants and the matter is under discussions in several conferences and summits like Journal of Nutrition etc. It has been widely proved by the scientists that tea and other flavonoid rich drinks can prove to be helpful in maintaining the health considerably. It has been proved that concentrated tea contains phyto-chemicals alongwith other flavonoids.

It has been revealed through researches that LDL cholesterol can be reduced by 11% by consuming 5 cups of black tea daily, whereas decrease in total cholesterol level is reported to be 6.5%. The researches were conducted extensively on the effect of black tea on blood lipids by keeping other components of diet constant. The results were derived through the researches made by regular consumption of six-ounce five cups of black tea daily for three weeks to a high cholesterol effected adult alongwith a low cholesterol and fat diet in order to avoid any confusions in this regard. It resulted into a considerable fall in cholesterol level, finally.

Thus, flavonoids found in tea are found rich in anti-oxidants that are proved to be good for the health of human being.

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