Green tea is believed to prevent cancer. In Japan, where green tea is consumed on a regular basis , there is a significantly lower rate for all types of cancer, especially cancer of the stomach, esophagus and liver. Green tea restricts the increase of blood cholesterol. HDL, the good cholesterol prevents atherosclerosis and must exist with the bad cholesterol, LDL, in proper balance for good health. Green tea catechins restrict the excessive buildup of the bad cholesterol.
Green tea helps control high blood pressure.
High blood pressure contributes to atherosclerosis. The catechin in green tea can prevent a rise in blood pressure. There is evidence that green tea suppresses aging. Green tea fights cavities because it suppresses the formation of plaque, and kills the bacteria that causes it. Green tea also kills oral bacteria and prevents bad breath, as a result.