Appraisal Neurodevelopmental Disorders

An example of poor methodology and bias in studies claiming fluoride decreases IQ

Publication reviewed: Arsenic and fluoride exposure in drinking water: children’s IQ and growth in Shanyin County, Shanxi Province, China Wang SX, Wang ZH, Cheng XT et al — Environ Health Perspect. 2007; 115:643–7. Many claims that fluoride decreases IQ are made across the internet. But the research base behind these claims are dominated by studies […]