Donald Trump's second term may threaten what's lauded as one of the top public-health triumphs of the 20th century: adding fluoride, a mineral that helps prevent tooth decay, to drinking water. That’s due to Robert F.

The U.S. Public Health Service’s recommended level of fluoride concentration is 0.7 milligrams of fluoride per liter of water, though the CDC says this is not an enforceable standard. When will House results come out?

Fluoride – it's added to the water systems of more than two thirds of Americans. It's in dental products from toothpaste to mouth wash. It's been the subject of long-running conspiracy theories. And now, Robert F. Kennedy Jr. says Donald Trump could try ...