There is not enough research on white matcha for us to be able to comment in too much detail, however, what we will say is that the word matcha means powdered leaf in Japanese. White powdered tea comes from Africa and it is not a Japanese tea. Not all powdered teas can or should be called matcha. On the market you can buy teas called white matcha or black matcha and this is misleading, especially to a consumer. True matcha must be shade grown, freeze-dried when picked and then stone ground in granite stone mills. The only tea used for matcha is green tea, not white, oolong or black tea.