Dr. Nan Fuchs reports that black tea is a natural pick-me-up and also is a mild calming agent at the same time. The caffeine and l-theanine support each other and help reduce your body's stress reaction. You can keep your hormone levels of cortisol-which increases under stress-down by drinking black tea.
A study showed that one hour after drinking their beverage, cortisol levels dropped by 47%, whether the tea was regular or decaf. The Europeans and Eastern cultures who drink tea every afternoon have this figured out!
As always, please buy organic + the best quality you can find.