Yes, the white tea is reputed to have more catechins than green tea (similar to the potency of active ingredients in broccoli sprouts vs mature broccoli etc.) but the practical question is whether it would yield more of the same strength GTP extract than the same amount of green tea... and/or at the same cost for a “normalized strength” extract.
If the answer is yes, then white tea may become a better source of .
While polyphenols include non-flavonoids as well as flavonoids, it seems that GTP responsible for cancer apoptosis is a specific flavonoid - epigallocatechin-3-gallate (EGCg).
Sadly, I do not know, nor have I been able to find out. But it’s at least nice to know that there might possibly be an even better source.
One trivia bit about green tea against cancer is that the Chinese have been using strong green tea enemas, a lot of them, to help treat colo-rectal cancer.
An extreme effort, if you can imagine having frequent tea enemas many times a day.