For decades, the majority of Americans have been drinking tap water with added fluoride to improve oral health. But WSJ’s Kris Maher says that backlash to fluoride is spreading. Nearly 20 communities have halted the practice since October and Utah has now banned adding fluoride to water across the state. This comes after a landmark ruling by a federal judge that the mineral poses an “unreasonable” risk, and Robert F. Kennedy Jr. has spoken out against it. Ryan Knutson hosts. 

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