Yes. White tea has the lowest caffeine content of all the true teas. In general, a normal-sized cup of white tea contains anywhere from 15 to 20 milligrams of caffeine. Green tea contains slightly more caffeine than white tea and less caffeine than black tea at 35 to 70 milligrams per serving. One thing to note is that matcha tea has higher amounts than other green tea since the tea is made of the entire ground tea leaf.