This is the most commonly known tea in the Western World. Ever fancy a good British cuppa? Your Orange Pekoe and Earl Grey are both common kinds of black tea. It is the most oxidized of any tea category. Its cup has a dark red colour with a sweet, sometimes slightly tannic aroma. Several studies have shown that it may help to reduce the occurrence of heart disease due to its partial prevention of cholesterol absorption. Like Green tea, it can help to maintain good cardiovascular function and regulate the circulatory system.