The benefits of a cup of green tea are indisputable--it lowers your risk of disease from simple infections to chronic, degenerative diseases like cardiovascular disease, cancer, stroke, periodontal disease, and osteoporosis. But athough this 5,000-year-old remedy is incredibly good for you, not all green teas are created equal.
The most healthful ingredient in green tea are flavonoids in the form of catechins--the most important of which is epigallocatechin-3-gallate (EGCG). It plays an essential role in green tea’s anticancer and antioxidant impact. But the way that green tea is produced has a lot to do with the amount of EGCG found in the product.

Tanti Ruwani, CC BY 2.0