Black tea is the most popular tea in the world. Black tea is a healthy delicious drink. Drinking black tea can help lower the risk of stroke because of high level of flavonoids. This compound helps reduce clotting of arteries and act as an antioxidant that reduce levels of damaging free radicals in the body. Black tea goes through full fermentation in which the leaf color darkens to give it its black color. The flavor of black tea differs and ranges from flowery and fruity to spicy and nutty.