re: water filter for fluoride, chlorine and calcium

quote:

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Calcium fluoride is good. Sodium fluoride is a pharmaceutical that has plenty of studies questioning its safety.

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Plenty of bullshite studies. Let me help you out here, fluoride is a halogen and the body doesn't care what kind of halogen it is, it will have an extremely short half-life in the body (about 6 minutes). Calcium, sodium, tin fluorides all work nearly exactly the same as far as the body is concerned, few studies suggest combination of sodium/stannous fluorides being slightly more effective than either alone but really nothing substantive. There is a lot of bullshite public health initiatives over the decades but fluoridation of drinking water isn't one of them. Sodium fluoride is naturally occurring but in a rare mineral, calcium is more common, both are produced in industrial processes as well as stannous fluoride. If you have a healthy, varied diet and you drink coffee or tea regularly then you are getting more fluoride in your diet than from your tap water anyway.