Boys who drink fluoridated water have an increased risk of a deadly bone cancer, a new study suggests.
Boys who grew up in communities that added at least moderate levels of fluoride to their water got bone cancer -- osteosarcoma -- more often than boys who drank water with little or no fluoride.
The risk peaked for boys who drank more highly fluoridated water between the ages of 6 and 8 years -- a time at which children undergo a major growth spurt. By the time they were 20, these boys got bone cancer 5.46 times more often than boys with the lowest consumption. No effect was seen for girls.
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