It has been shown to counteract both the initiation and the promotion of forming cancers. Some studies have shown green tea blocks the formation of certain tumors. Green tea has also been shown to have cardiovascular benefits. When producing black tea, the leaves of the tea plant are oxidized. This oxidation process destroys many of these beneficial polyphenols.
Green tea is produced by lightly steaming the fresh cut black tea leaf.
Unlike black tea, the leaves in green tea are not oxidized so the polyphenols are preserved. Many researchers claim green tea extracts, when used topically, seem to protect the skin from serious damage and aging due to harmful rays from the sun. She says to see benefits from green tea there must be a 10 percent concentration of polyphenols, or the active ingredient, in the product. We need to have it be either six to eight cups when you ingest it per day or about 400 to 500 milligrams in capsule form. In the products that you rub on, the green tea should compose about ten percent of that product in order for it to produce the anti-oxidant effects.