Posted by John Giddy on March 05, 2008 at 20:42:21 from 58.175.114.160 user jgiddy.
In Reply to: Re: Water in the bathroom. posted by John Nichols on March 05, 2008 at 19:14:13:
Except for those water sources which already had fluoride in them naturally.
I think (may be my elderly brain) that it was a study of teeth of people living in different water supply areas which pointed out the beneficial characteristics of fluoride on dental health.
Adding of fluoride to water supplies was started about the 1960s or so, I think