Florida’s Surgeon General is the latest high-profile politician to advise against adding fluoride to drinking water. For decades it’s been credited with keeping teeth healthy, but now some are starting to question if it is necessary or even harmful in high doses.

Florida's surgeon general, Dr. Joseph Ladapo, cited developmental concerns from higher levels of fluoride than are found in most U.S. water supplies.

The state’s top health official cited controversial studies that suggest the widely hailed public health practice poses a risk to developing brains.