I notice neither that Wikipedia page nor the general water fluoridation page cover water fluoridation's alleged effect on IQ, although that's the main recent claim I've seen conspiracy theorists make about it. (My impression, based on a desultory skim through a few of the studies they refer to: they're wrongly inferring causality from fairly weak observational studies that compare people in different regions with different levels of fluoride in the drinking water. These studies normally take place in less developed nations like India & China where the water is more likely to have naturally high levels of fluoride — often more than is added in the US — and other toxic chemicals that could readily confound the results.)
I've recently learned about alleged dangers to drinking fluoridated water. Amongst them is increased rate of cancer and lowering of IQ. Interestingly enough, wiki doesn't mention this at all, but searching for it brings up a decent amount of (what look like) reasonable results. I am really curious about this, and want to learn more about this. I was wondering if anyone on LW has already conducted a research literature investigation on this topic, or if you just have tips/advice on what to pay attention to when I read the literature.
Thanks!