In fact, there is some evidence that tea can soothe your nerves: regular tea drinkers do tend to show a calmer physiological response to unsettling situations (such as public speaking), compared to people drinking herbal infusions.
It is possible to draw five or six good infusions from a single pot of tea,but subsequent infusions must be extended in duration to extract maximum flavour:the second infusion extended by approximately ten seconds to 40 seconds,the third extended to 45.