Black tea is a type of tea that is more oxidized than oolong, green, and white teas.Black tea is generally stronger in flavour than other teas.It is made from leaves of the shrub (or small tree) Camellia sinensis.In China, where black tea was discovered,the beverage is called "red tea" due to the color of the oxidized leaves when processed appropriately.Plain black tea without sweeteners or additives contains caffeine, but negligible quantities of calories or nutrients.
