Montreal residents say a petition by RFK, the US health secretary nominee, stoked their city’s rejection of fluoride.

Fluoride is added to water systems of more than two-thirds of Americans. Some Florida cities banned it for health concerns.

The proposed class actions cite warnings from U.S. health regulators that fluoride-based toothpastes and rinses not be used ...

The proposed class actions cite warnings from U.S. health regulators that fluoride-based toothpastes and rinses not be used by children under ages 2 and 6, respectively, and that the toothpastes ...