Green Tea has less caffeine than black tea
You can't tell how much caffeine a tea contains from its colour.High grade green tea is made from buds and young leaves. The younger the leaf, the more caffeine it contains. Black tea is made from larger, more matured leaves. This means that a top grade loose green tea can have as much, and sometimes more, caffeine than black tea.This doesn't mean fine green tea is more caffeinated. To the contrary, they can feel calming and relaxing. This is because they contain even more of a special compound called theanine.