小葡萄的毛病就是见到风就是雨。你知不知道你说的氟化钠降低智商的说法从何而来？看看
wiki的说法。
Brain[edit]
A meta analysis conducted on epidemiological studies conducted in China concluded that exposure to "high" levels of fluoride (variously defined) in childhood was associated with a reduction in IQ of about 7 points.[13][14] The authors of the meta analysis noted that this research is not applicable to the safety of artificial water fluoridation because the adverse effects on IQ was found with fluoride levels that were much higher than typically found in artificially fluoridated water.[15] The meta analysis has been criticized for failing to account for confounding factors. For example, in some of the studies fluoride exposure came from the burning of high fluoride content coal, and used a control group from an area in which wood was used as fuel.[16]
一个是要高浓度，但是这篇
论文没有明确说明多高才是高；第二这篇荟萃分析采用的原文中一部分是暴露在高氟的煤炭燃烧的产物里。氟化物的主要副作用是骨质疏松。
