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Fluoride in drinking water has no effect on IQ or brain function, long-term study shows (twin-cities.umn.edu)

submitted 1 day ago* (last edited 1 day ago) by Deep@mander.xyz to c/science@lemmy.world

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The study, published in PNAS, examined Wisconsin state testing records, archival information about when Wisconsin cities began to fluoridate their water, and data from the Wisconsin Longitudinal Study, which has followed a random sample of 10,317 high school seniors from 1957 through 2026. Key findings include:

There is no evidence supporting a connection between community water fluoridation and children’s IQ.

There is also no evidence supporting a connection between community water fluoridation and cognitive functioning at various points later in life.

Findings confirm evidence published in previous research which also used a national sample, but considered school achievement test scores instead of actual IQ scores.

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[-] Rachelhazideas@lemmy.world 3 points 1 day ago

Absence of evidence is not evidence of absence.

Two things can be true at the same time. Fluoride has provided significant benefits to dental health, while it's effects on the human body are not fully studied.

Modern medicine has numerous gaps when it comes to the chronic illness community, and medical gaslighting is the default experience when people attempt to report symptoms.

[-] adespoton@lemmy.ca 4 points 1 day ago

Fluoridosis occurs when fluoride is present in our bodies at a level orders of magnitude higher than what we get naturally or artificially from most water sources.

And you know what happens long before it’s at harmful levels in the body?

Your teeth start to stain from it. And any doctor or dentist who sees fluoride stains on your teeth will immediately jump into action and help you eliminate whatever source is causing the problem. It won’t be your water supply, because that’s more likely to kill you from the other additives than from the fluoride if you drink too much.