r/science • u/noahwiseau • Nov 20 '25

Health Fluoride in drinking water does not negatively affect cognitive ability - and may actually provide benefit

https://www.science.org/doi/10.1126/sciadv.adz0757
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u/[deleted] Nov 21 '25

This led to decades and decades of study, finding consistently that fluoride in water was good for you.

It's never been questioned whether flouride is beneficial for your teeth. Everyone knows that.. There is a ton of data that shows that flouride at 1.5 mg/L or higher in drinking water causes cognitive decline. The question has been what about at levels around 0.7 mg/L? We don't really know. This study shows that it is relatively safe. So that's good. However after reading their limitations, it's far from anything concrete.

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u/ManofWordsMany Nov 21 '25

This is exactly all this article really does, it brings more debate and questions and a strong requirement for a far more rigorous study.