You're not alone if you have questions about fluoride in your water supply. We reached out to experts to get answers.

In a social media post three days before Trump was elected, Kennedy wrote that on Jan. 20, "the Trump White House will ... availability of fluoride from other sources such as toothpaste, the ...

However, fluoride can also enter public water systems from natural sources, including runoff from the weathering of fluoride-containing rocks and soils and leaching from soil into groundwater.

Every 1 part per million increase in fluoride in urine — a way of measuring all the sources of fluoride a person consumes — was associated with a roughly 1 point drop in a child’s IQ score ...