Three different teas are produces from the same Camellia sinensis plant.  White tea is produced by cultivating the silvery-white down young leaves and buds of the Camellia sinensis plant that are then bake dried.  Green tea is produced by steaming the fresh cut camellia sinensis, which inactivates the enzymes that would otherwise oxidize the plant material.  Black tea is produced by allowing the leaves to oxidize.  Of the three teas, black tea contains the least active compounds due to the oxidization process used to create it.