Fluoride is not a specific thing but a category of things. Some water naturally has calcium fluoride (CaF) in it, so they don't add other fluorides. Generally, it's sodium fluoride (NaF) added to toothpaste. Often times they're dumping hexasilico fluoride or some shit to the drinking water. This stuff is a complex molecule that's a byproduct of fertilizer production. Calcium fluoride is the least harmful of the bunch followed by sodium fluoride.
I hear you, but here in the UK flouride is added into every single water authority and yes it's the bi product from aluminium manufacture(if I recollect correctly), as for the other stuff, I'm not that up on it, it's been years since I looked at all this stuff, I will just not partake in any of it, you do what you will.
Fluoride is just one of many problems with tap water. All of the systems have chlorine in them or else, they'd be full of bacteria and mold. Then there is a host of other pollutants and chemicals in there. I have a condition called LPR, and this is when stomach acid affects your throat. I find tap water is a huge contributor to this. Even drinking the "filtered" what at the gym created a huge LPR problem. Unfortunately, even if you're not drinking from the tap at home, you can still be exposed to the tap water in food, drinks, and sauces at restaurants and possibly at manufacturers.
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