In the past five years, 74 cities have voted to remove fluoride from their drinking water, despite thousands of studies showing it prevents cavities.
It has been hailed by the Centers for Disease Control and Prevention as one of the top public health achievements of the 20th century. Numerous studies have proven its safety and efficacy. But fluoride — the naturally occurring compound that prevents cavities and tooth decay — is still sparking heated debates, seven decades after it was first added to America’s water supply.
“Anti-fluoridationists” — a small but vocal minority — are disputing long-established science to say that fluoride added to tap water lowers IQ and causes everything from acne to anemia to Alzheimer’s.