There is an article on The Telegraph Website about a scientific study done in England at the University of Kent which concludes that fluoride in drinking water in parts of England is causing weight gain and depression. The findings of the survey were denied by Public Health England, who has maintained for decades that fluoride in the drinking water is perfectly safe and key to fighting tooth decay.
This is a debate which has gone on for years both in the United States and England. Fluoride is added to the water in the first place since it helps keep bacteria from attacking tooth enamel.
In my opinion, the idea of the government putting anything in the drinking water – even if it is something that is good for them – is simply unsettling to people. Therefore, they look for evidence that fluoride is bad for them. I doubt that it is. Tooth decay is the larger evil.