The name "white tea" derives from the fine silvery-white hairs on the unopened buds of the tea plant, which gives the plant a whitish appearance. White tea undergoes the least processing of any "true" tea. Tea buds are picked before they are even ripe and opened. They are sun-dried and that's it! There is no rolling or oxidation. White tea is produced in smaller quantities relative to other types of tea.
Since white tea is derived from the tea leaf it does contain caffeine, but not at the same level as a black or green tea