Fun fact: you'd have to drink about 7500 litres of water to get a toxic dose of fluorine A fatal dose of water is ~10 litres
Naturally-occurring fluoride is usually 10-20x as concentrated as the avg tap water (i.e. 20ppm vs 0.5-1ppm)
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Naturally-occurring fluoride is usually 10-20x as concentrated as the avg tap water (i.e. 20ppm vs 0.5-1ppm)