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" ... Things to remember when reading studies: 1. Natural drinking water can often contain fluoride, sometimes too much. Regulated drinking water sometimes has flouride removed, not added. So don’t confuse papers on polluted water with those on regulated water! 2. The danger is in the dose. Fluoride, oxygen, even water itself are all dangerous in high doses. We still drink water even though water poisoning kills people every year. So if the dose of your study is not listed or is higher than that of regulated drinking water, then it is not relevant. 3. Real studies are in peer reviewed papers, not random websites. 4. You can find papers that say anything. Finding a systematic review or meta-analysis is better. ... "