Green Tea Leaf Benefits and Information

Epigallocatechin gallate (EGCG) is one of four major catechins in green tea. Catechins belong to the flavan-3-ol class of flavonoids. Green tea catechins are the flavan-3-ols found in green tea leaves. All catechins including EGCG are polyphenolic substances. Black tea leaves have a much lower content of these catechins. That's because black tea leaves undergo extensive fermentation, during which the majority of the catechins are enzymatically oxidized to the major pigments of black tea leaves, theaflavin and thearubigen.

Green tea catechins, especially EGCG, make up approximately thirty percent of the dry weight of green tea leaves. Of the catechins, EGCG is the most abundant one in green tea leaves. Green tea has and continues to be a popular beverage in the Orient (especially in China and Japan). In this region, it is thought to have a number of health-promoting benefits, and it is used in the management of various disorders.

The catechins in green tea are responsible for the purported health benefits of the plant. These catechins are antioxidants, with EGCG appearing to be the most power antioxidant of all the green tea catechins.

Dosage and Administration

A large number of green tea extract formulas containing EGCG are used today. EGCG is the principal catechin in these supplements. An average dose of green tea is 125 mg to 250 mg daily. However, other research suggests as much as 10 cups (2,500 ml) per day is necessary to obtain observable benefits from green tea ingestion.

To brew green tea, 1 teaspoon (5 grams) of green tea leaves are combined with 1 cup (250 ml) of boiling water and steeped for three minutes. Other forms of green tea supplementation are available in the form of ingestible tablets and capsules containing standardized extracts of EGCG.

There are a variety of high quality, easy to take green tea tablets, powders and encapsulations available on the market.