As of January 2022, 74 human studies found fluoride linked to lower IQ - 23 published since 2017 The fetus and formula fed infants are the most vulnerable to fluoride's neurotoxicity.
These studies are the basis of a current lawsuit against the EPA which could end the artificial fluoridation program in the US to protect the brains of the fetus. The next court date is in June 2022. Counsel for the plaintiffs is Michael Connett, JD, Partner, Waters Kraus & Paul.
Fluoride from foods and beverages consumed during pregnancy is associated with lower cognitive neurodevelopment in boy babies, even when fluoride is ingested at recommended levels, report researchers Cantoral et al. in Neurotoxicology (December 2021) and funded by the US National Institutes of Health.