Water Fluoridation Study Finds No Evidence of Cognitive Harm - Summary - DentalSpire
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Water Fluoridation Study Finds No Evidence of Cognitive Harm

New PNAS study using Wisconsin cohort data finds no negative association between community water fluoridation and adolescent IQ or cognitive performance across the life course.

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A study conducted using Wisconsin’s representative data found no link between community water fluoridation and negative impacts on adolescent IQ or cognitive functioning throughout life. This research further developed prior analyses by directly measuring IQ and considering childhood geographic mobility. Participants were categorized based on fluoride exposure levels, and after thorough analysis, including socioeconomic factors, no significant cognitive impairment was detected. These results challenge recent trends to discontinue fluoridation in certain states.

Original Source(s)

Water Fluoridation Study Finds No Evidence of Cognitive Harm

  • by Kerri Miller

  • April 23, 2026

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