Robert F. Kennedy Jr. has put the decades-old debate over water fluoridation back on the table. As President-elect Donald Trump’s pick for Health and Human Services secretary, he might become the most powerful public health figure in the US who believes we should take fluoride out of our water. Currently, it’s up to municipalities to set their own water fluoride doses — most of them set them around 0.7 mg per liter of water — so it’s unclear whether a federal agency will be able to change course on water fluoridation in the US. About 63 percent of Americans have fluoridated water. Millions of Americans also drink water that is naturally fluoridated at even higher........

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