Fluoride analysis triggers renewed debate over what levels are safe for kids

Most communities in the U.S. add fluoride to the tap water. It has been common practice for nearly 80 years to protect against tooth decay and cavities, and it’s considered a major achievement in public health. The Centers for Disease Control and Prevention says research shows that community water fluoridation reduces cavities by around 25%.

It has also long drawn opponents who have raised concerns about the practice, ranging from evidence-based concerns to unsubstantiated conspiracy theories. The debate heated up recently when President-elect Donald Trump picked Robert F. Kennedy Jr. to lead the Department of Health and Human Services. Kennedy is a longtime anti-vaccine activist who has also been outspoken in opposing water fluoridation, and if he’s confirmed in the role, he could influence policy.

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