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 surgeon general calls it "public health malpractice" to fluoridate water, citing research that suggests exposure to high levels of fluoride can cause lower IQ in kids. National experts say there is not enough data to determine if the lower level present in most U.