Cross-Posted, via Science Community.
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.
I doubt this study
Numerous previous studies have shown benefits from fluoridation.
This is damning if true…
Or it could just be they don’t have a valid control that doesn’t have some fluoridation so they’re not really measuring any difference. It’s just taken for granted.