Voting Question: seriouse question about wu-long-tea diet ?

hi
im fifteen and want to lose a bit of weight off my legs thighs bum area . . . does it help lose weight off that area ? . .
if i drink 2 cups a day how long will it take to lose about half a stone ?
and most important question am i too young to be using it? . . . is it bad for me ??
PLEASE answers :D
xxx