It is linked to some cancers, causes some bone issues and has been linked to mental development issues. It's shown to have a negative impact on IQ.
Fluoride: Risks, uses, and side effects
Fluoride is found naturally in soil, water, and foods. It is added to water to help prevent tooth decay, but not everyone agrees with this. Find out more.www.medicalnewstoday.com
Clearly I was unaware of that. I never drink tap water, because I live in Georgetown, and the water here is turrible. (High Bridge Springs/water cooler) Fluoride toothpaste though.