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flag A major study finds no harmful effect of fluoridated water on baby birth weight.

flag A new Columbia University study analyzing over 11 million births finds no significant link between community water fluoridation and birth weight, with changes ranging from a 8.4-gram decrease to a 7.2-gram increase—none statistically meaningful. flag The research, published in JAMA Network Open, used county-level data from 1968 to 1988 to compare outcomes before and after fluoridation, supporting the safety of fluoridated water during pregnancy. flag The findings add to evidence that water fluoridation does not harm infant health.

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