Lynn R. I had teeth that were mottled with white spots when I was a child. My dentist said not to worry - a lot of kids had that. I found out recently that that is dental fluorosis and one of the first signs of fluoride poisoning. Years ago, they used to use fluoride to calm down a thyroid that was hyper. In other words, they used fluoride - a poison next to arsenic in toxicity, to subdue an over active thyroid. Can anyone tell me why there is such an epidemic of underactive thyroid conditioins today? If the mercury don't get ya, the fluoride will. Anyway, with 1ppm fluoride put into the water to supposedly strengthen teeth (HAHA) just think. That water is used to water the garden from which you get your veggies. The cows that you get your milk and meat from drink it. Have you ever read how much fluoride is in juices? An amazing amount! They water the grapes/apples/etc with fluoride water. There are places in India where there is a lot of fluoride in the water naturally. Whole villages of people there are bent over and crippled because of it! Fluoride is used as rat poison! Some people are depressed. Maybe they should add an anti-depressant to the water supply to benefit those people too. And, I am hypothyroid. Let's add Synthroid to the water supply for people like me. I am sure you can see the absurdity of it all. Unless you are in charge of the poison , er, ahem, fluoride supply and/or stand to gain monetarily from poisoning a whole population with it.