If you want to ditch fluoride, boiling is a zero-star tactic. Try a reverse osmosis filter or a special active alumina filter instead. Those use serious chemistry to trap fluoride ions.
Is Fluoride in Water Good or Bad? I Quench Water
Distillation works too—but that’s not boiling. That’s steam capture, where you condense pure water vapor. That’s a whole other gadget, not your pasta pot.
Or, you could just embrace the fluoride. Public health officials love it. It’s been reducing cavities in kids for 75 years. A little extra in your boiled pasta water? Not a crisis.
Quirky facts to impress your friends
Did you know fluoridated water was first tested in Grand Rapids, Michigan, in 1945? Kids there had 60 percent fewer cavities than kids in non-fluoridated cities. Boiling would have ruined that happy experiment.
In some countries, they add fluoride to salt instead of water. In others, they add it to milk. Imagine boiling milk to remove fluoride—you’d get a nasty curdled mess. Don’t try that.
Here’s a mind-bender: the fluoride in your water likely comes from industrial waste or natural rock. It’s the same stuff in fluorine gas, which is dangerously reactive. But dissolved in water, it’s as safe as your dentist says.
