New research out of the U.K. says indicates that fluoride can cause underactive thyroid. The higher rates of underactive thyroid occurred in areas where fluoride showed up in drinking water at a concentration greater than 0.3 mg per liter. Fluoride is added to drinking water in order to improve dental health though some liken it to medicating the public without consent.
The study was extensive and examined 98 percent of England’s GP practices. Areas with the greatest amounts of fluoride were added to the water were 30 percent more likely to see high rates of hypothyroidism. […]