All tea that comes from the tea plant does have caffeine
that affects people’s bodies in different ways. No matter the tea, though, one
of the most important things we can stress is that the caffeine in tea is
different from the caffeine in coffee! With that being said, as a general
rule—caffeine is more potent in more oxidized teas (black tea), less potent in non-oxidized or hardly oxidized teas (green tea, white tea) and falls in the
middle with partially oxidized tea (oolong tea).