Found to have a toxicity level between that of arsenic and lead, I would get it out of your families mouths and water. You can by non flouridated dental hygiene products and tell your dentist you decline its use during your cleanings. The flouride they use is NOT, in the extremely low concentration found in plants we might eat. Plants make minerals and salts safe for us. This garbage derivative is the toxic waste by product of phosphate fertilizer mining in it's toxic rock form. These mining companies had to pay high costs for its safe disposal as a toxic waste. Rumsfeld said, "We can fake studies and get it approved for dental health and let the populations livers process this waste for us and make money instead of having to pay money to get rid of it. True story. Go research it.