Robert F. Kennedy Jr.'s recent comments on fluoride are prompting questions about its safety and why it's used in drinking water. Kennedy, a former presidential candidate turned Trump supporter ...

Fluoride is a mineral naturally found in fresh and salt water, but in much of the U.S., a tiny amount more is added at water treatment plants to help prevent tooth decay. Every day, bacteria in ...

At least nine Wisconsin communities have decided this year to stop adding fluoride to their drinking water and at least six more are considering it, undermining what officials say is a cornerstone of ...