Fluoride has long been celebrated for its role in preventing dental cavities. It’s commonly added to public water supplies and found in dental products across the globe. However, emerging research has begun to question whether chronic fluoride exposure during pregnancy and early childhood may come at a hidden cost — namely, the neurological development of children.
A prominent meta-analysis led by researchers from Harvard T.H. Chan School of Public Health examined 27 studies (mostly from China) and found a consistent association between higher fluoride exposure and lower IQ scores in children. While the studies varied in design, the overall trend was clear: excessive fluoride during critical periods of brain development may impair cognitive function.
Further studies published in peer-reviewed journals support this concern. One research review, available via the International Journal of Environmental Research and Public Health, highlights fluoride as a possible neurotoxicant — much like lead or mercury. Another publication in Environmental Health Perspectives suggests that prenatal fluoride exposure may affect children’s intelligence, even at levels once considered safe.
🔗 Study 1 – PMC6923889
🔗 Study 2 – PMC7261729
One of the most concerning findings is that fluoride crosses the placenta, meaning that fetuses can be exposed during the most sensitive stages of brain formation. The consequences of that exposure may not fully emerge until years later, manifesting as lower cognitive performance, behavioral changes, or learning difficulties.
Fluoride undeniably contributes to better dental health, particularly in low-income communities with limited access to dental care. But when it comes to neurodevelopment, even small risks can have large-scale consequences for public health. This has prompted calls for a reassessment of “safe” fluoride levels, especially for pregnant women and young children.
Are we ready to rethink our approach to fluoride in light of modern neuroscience?
Let’s make health decisions informed by the full scope of evidence — not just tradition.
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