Green tea is not naturally caffeine-free. Green tea contains an average of 29 milligrams (mg) of caffeine in an 8-ounce cup, but the amount can vary. Black tea typically has more caffeine at 47 mg ...
These distinct features are typically attributed to the tea’s unique production process. Because of its naturally high caffeine content, Assam tea is frequently marketed as a breakfast tea.
But you don't need to cut out all caffeine for your health ... little to do with any magic properties of the tea. A few small-scale studies have linked an increased metabolic rate to drinking ...
Don't count on it ... Both drinks have their passionate defenders, but it’s tough to pick a clear winner. Coffee has twice as much caffeine as tea, but green tea has more L-theanine, a building ...