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A comment on Show HN: I invented a caffeinated toothpaste. Parent comment

Re:Show HN: I invented a caffeinated toothpaste by schwap on Thursday September 15, 2016 @07:16PM (#12510653)
> Crazies or people who actually care about environment?

The environment???

Fluoride, like many minerals, is naturally occurring in many water sources, just not (all) of the ones that are used for drinking water. Additionally, the concentration of fluoride for this purpose is minuscule (0.7 mg/L according to Health Canada).

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Re:Show HN: I invented a caffeinated toothpaste by DiabloD3 on Friday September 16, 2016 @12:23PM (#12515108)
This comment is why you absolutely must test well water every 2-3 years.

Up here in Maine we have a pretty bad fluoride issue in some areas, and a lot of people are not testing their well water, and ending up with fluoride poisoning.

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