Ua paʻi ʻia nā hopena o ke aupuni US mua i hoʻopaʻa kālā ʻia no ka fluoride a me ka IQ. Ua loaʻa i kahi hui o nā kānaka noiʻi kahi pilina koʻikoʻi ma waena o ka hōʻike fluoride i nā wahine i ka wā hāpai a me ka hoʻohaʻahaʻa ʻana o ka IQ i kā lākou mau keiki, i hōʻike ʻia e ka Fluoride Action Network.
Ua paʻiʻia ke aʻoʻana Nā Manaʻo Ola Ola e nā ʻepekema mai ke Kulanui o Toronto, Ke Kulanui o Michigan, Harvard, McGill, a me ke keʻena olakino olakino lehulehu o Mekiko. Hāʻawi kālā ʻia e ka National Institute of Environmental Health Science, me ka $ 3 miliona o nā haʻawina.
