Nearly three-quarters of the US population – about 209 million people – are served by drinking water systems that have fluoride in them, according to CDC data.

Researchers found removing fluoride was associated with an increase in tooth decay of 7.5 percentage points, or 25.4 million cases, and cost approximately $9.8 billion over 5 years.

Utah has become the first state to ban fluoride in public drinking water, despite widespread opposition from dentists and national health organizations. CNN values your feedback 1.

The U.S. has been adding fluoride to drinking water for decades. The CDC, as well as doctors and dentists, heralds the mineral as one the greatest public health achievements of the 20th century .

Florida Governor Ron DeSantis Signs Fluoride Ban 00:28. Florida Gov. Ron DeSantis signed a measure Thursday prohibiting local governments from adding fluoride to their water systems, making it the ...

Gov. Ron DeSantis of Florida signed a bill into law on Thursday that bans the addition of fluoride to public water supplies, making Florida the second state to prohibit the widespread public ...