Do teas contain different amounts of caffeine?
Caffeine is a natural ingredient found in the tea bush. All teas contain roughly the same amount of caffeine (40-70mg per cup) but exact quantities depend on the variety of the bush from which the particular leaves were taken, where the bush was grown, the age of the leaves when plucked, whether the tea is brewed from large pieces of leaf or small particles and how long the tea is steeped. A cup of tea contains about half the amount of caffeine found in a cup of coffee, because a smaller quantity of tea is required to make a cup.
