MONDAY, June 2, 2025 (HealthDay News) — Removing fluoride from the U.S. water supply could result in more than 25 million more decayed teeth in children and teenagers within five years, a new study warns.

That’s the equivalent of a decayed tooth for 1 of every 3 kids in America, according to researchers from Mass General Brigham.

“Fluoride replaces weaker ions with...