Regarding Fluoride, you state that people who developed fluorosis where consuming over 17 cups of tea per day. Would you be kind enough define the size of a cup; there is a lot of confusion as to what volume a cup of green tea represents. In the anglo-saxon world a cup represents either 8 oz (236 mls) or 250mls, in Japan a cup of green tea represents only 6 oz of the beverage. There is a huge difference between 17 x 6oz cups and 17x 8oz cup (33% delta). Could you provide links to the study in question. BTW current research indicates that even low levels of Fluoride are considered toxic (remember that the research that indicated that fluoride is beneficial came at a time when cigarette smoking was considered beneficial; doctors were quite primitive back then). Chinese research indicates that higher quality tea is low in fluoride and that low quality or Puer tea is extremely high in fluoride.