That may not even be fluoride in your water supply. Where is the cheapest place to produce fluoride and buy fluoride?
China.
Over 90% of the world fluoride supply comes from China. The chemical comes in big buckets. There are no "fluoride purity laws" in China. US municipalities buy their fluoride from chemical suppliers who are buying their stock from China. When these buckets are tested, some are as low as 50% purity. So what's in these buckets if it isn't 100% fluoride? NOBODY KNOWS!
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