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.
“The thing I gravitated to was being the class clown. It was very competitive.”
“To all those mothers and fathers who are struggling with teen-agers, I say, just be patient: even though it looks like you can't do anything right for a number of years, parents become popular again when kids reach 20.”