Research shows that green tea has many health benefits, including lowering cholesterol, improving blood flow and preventing heart-related problems, such as high blood pressure and congestive heart failure. Studies also show that green tea has beneficial effects on memory and helps block the formation of plaque associated with Alzheimer's disease.
Green tea seems to aid in stabilizing blood sugar in diabetics. It has also been shown to aid in weight loss and prevent damage from a high-fat diet. The theanine found in green tea is a natural relaxant which has a calming effect. It has not been conclusively proven that green tea aids in cancer prevention.