lead's scary too! so are 'mercury fillings' in teeth and what not, stuff that many still walk around with. nanofilters are getting better, time magazine's invention of the year years back was that life straw deal, but still, the filtration system in people's sinks for the most part is non-existent...and fluoride is NOT good for us is my guess anyway, and it doesn't prevent cavities despite what dentists who don't ever explain how it prevents cavities have to say on that matter and even if im wrong about that and it does, even if it guarantees you'll never get a cavity, the adverse effects it has on the brain and microbiome and other parts of the body are worse than cavities anyway; it's likely toxic waste being dumped into us instead of otherwise illegally being dealt with, various byproducts from various operations throughout the world...fluorine is on the periodic chart of elements; it's a thing, but fluoride...yeah, what's the chemical code or graph or ingredients or constituents of that? does literally ANYONE even know? what if it changes based on what's available, or if its different formulas for different states for different reasons, etc.? paranoia? perception? depends on the Truth!