I have purchased a Strontium concentrate, as I have read that it helps bones and teeth. I used to get a tooth paste for sensitive teeth, and the active ingredient was Strontium, and it worked! Now they don't use it anymore. Note: this is not the radioactive stuff you may have read about, but is the unadulterated mineral.
I remain puzzled as to beneficial use of the other minerals. And I don't have the slightest idea about how many parts per million would be good/useful or bad/harmful/burden on the body to remove, or ineffective/waste of money.
Does anyone know anything about this or have any reliable references to study?