Just as each individual needs to discover his or her own level of caffeine tolerance, it’s also important to know the state of your body’s constitution to determine what kind of tea and how much you should drink.
I’m trying to find out more about tea and the Traditional Chinese Medicine (TCM) concepts of heaty/cooling/damp/dry.
According to macrobiotics, all teas are yin, but houjicha and kukicha are more neutral. The teacher from the Chinese tea appreciation class I attended also warned us that tea is very yin, so those with yin constitutions should drink in moderation. She also pointed out that drinking tea cold made it even more yin. Among Chinese teas, Pu Erh tea is the most neutral.
This page on the side-effects of green tea points out that the way the tea is handled also affects its properties. In TCM, tea left to go cold is ‘damp’ and causes phlegm, while drinking tea on an empty stomach causes ‘coldness’ to enter the lung & stomach system.