Fluorine has a protecting action against caries, but this is a local effect. If you drink it, you are running the risk of all kinds of toxic actions.
“I don't know what people who I've never met think about me. Some have written horrible things, some have written nice things - but I'm proud of the fact I've remained close to everyone I've ever worked with.”
“Whether or not all this came to pass in an East African ditch, I wouldn't like to say. Perhaps it happened in North Africa or further west, but Africa was definitely the place.”