I know Granny told you to boil everything to death, but boiling water actually concentrates fluoride. Imagine you’re a fluoride ion at a hot spring—congrats, you just got stronger. The only thing boiling does is make you wait an extra ten minutes for your tea. Instead, accept that you need science, not grandma magic.
So what actually works? Let’s meet the three musketeers of natural fluoride removal: activated alumina, reverse osmosis, and distillation. But since you asked for “natural,” we’ll focus on the first two without plugging in a nuclear reactor.