The second part of the Harvard study, published in , compared the fluoride levels in bones near tumors in people with osteosarcoma to the. In a meta-analysis, researchers from Harvard School of Public Health (HSPH) Some studies suggested that even slightly increased fluoride. In , Grand Rapids, Michigan, became the first community in the world to add fluoride to tap water. When subsequent studies showed a. The second part of the Harvard study, published in , compared the fluoride levels in bones near tumors in people with osteosarcoma to the levels in people with other types of bone tumors. We're talking with Dr. Small studies by themselves might not provide the answers, but taken as a whole they tend to have more weight. The effects of comprehensive control measures on intelligence of school-age children in coal-burning-borne endemic fluorosis areas. Assessment of groundwater quality with special reference to fluoride and its impact on IQ of schoolchildren in six villages of the Mundra Region, Kachchh, Gujurat, India. Chen YX, et al. When considering their consistency with numerous animal studies, it is very unlikely that the 50 human studies finding associations between fluoride and reduced IQ can all be a random fluke. Qin LS, Cui SY. Hong et al At least four more studies finding a link between fluoride exposure and decreased intelligence IQ of children were published this year, putting the total number of such studies at Xiang Q, Liang Y, Chen L, Wang C, Chen B, Chen X, et al.