Rooibos has a red tint to it when dry, and because of this it is sometimes known as red tea, redbush tea, or South African red tea. The leaves turn red when they are oxidized, which is part of the process that goes into making this delicious tea. Oxidation also helps to bring out the leaves' distinctive flavor. Rooibos Tea is often served black, because it is naturally sweet tasting, although sugar and cream can be added. It is a caffeine-free beverage that is also high in antioxidants.