There has been an increase in a condition called fluorosis . It causes spotting and streaking on children 's teeth . The FDA says the new levels will still prevent tooth decay but minimize fluorosis . It was first added to public drinking water in the 1950s .
There has been an increase in a condition called fluorosis . It causes spotting and streaking on children 's teeth . The ADA says the new levels will still reduce tooth decay but minimize fluorosis . Fluoride was first added to U.S. drinking water in the 1940s .