Green, black, oolong and white tea are all made from the exact same leaf of the Camellia sinensis plant. Green tea is minimally oxidized during processing of the tea leaf (for example sun drying instead of roasting), while black tea has the maximum oxidation during processing. Green tea has substantial differences in comparison to black tea. First, the tea leaves are a light natural green color, while black tea leaves are darker. Green tea brews a lighter color and is more sweet in flavor with a natural taste. Black tea has a much higher caffeine content because the oxidation of black tea concentrates the caffeine while green tea has a higher amount of flavonoids. In fact, the amount of flavonoids in green tea is similar to the amount in fresh fruits, vegetables and wine. There are many varieties of green tea due to growing regions, harvesting time and processing method including the cut or roll of the leaf.