One of my favorite doctors, Sean Carroll, from Health Care Triage, explains why a recently circulated study about fluorinated water being bad is just a myth. First of all, look at the origin of the study: China and Iran. Not the most trusted sources in regards to anything. They make good copies of everything, though 😀
When it comes to fluoride in water, it was a necessary addition in US and the doze is very small, about 1.2 mg/L in NY as opposed to 11.2 mg/L int he China study. Also, using fluorinated water decreased tooth decay by about 50% in adults and children. The studies conducted in US did not show any issues for the general population.