Boiling water works wonders on bacteria and viruses. Heat them up past 212°F, and they die a happy death. But fluoride? It’s a dissolved mineral, like salt in soup.
When you boil saltwater, the salt stays behind. Same deal with fluoride. The water evaporates, but the fluoride—and all its cavity-fighting glory—gets more concentrated. Yes, you read that right: boiling increases the fluoride level.
Here’s the quirky math: boil a pot for ten minutes, and you’ll lose some water to steam. The fluoride doesn’t vanish. It just gets a denser party in a smaller volume. Your final glass might have more fluoride than you started with. Oops.
The weird science behind it
Fluoride is a fluoride ion—a tiny charged particle. It dissolves completely in water, like sugar in lemonade. You can’t filter it out by boiling because boiling doesn’t change its chemical structure.
Even a furious rolling boil for an hour won’t break fluoride’s bonds. It just makes your kitchen steamy and your electric bill mad. Fun fact: some people try to boil away lead or arsenic, but for fluoride? It’s like trying to cough away a headache.
What about that white crust on your kettle? That’s calcium carbonate from hard water, not fluoride. Fluoride leaves no crusty evidence. It’s a ghost mineral—visible only in a lab test.
