PubMed · 4505118
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B A Burt, E O Petterson. 1972-07-18. Fluoridation: developments in Sweden.. https://doi.org/10.1038/sj.bdj.4802875
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Few names crop up so often in the context of water fluoridation as that of John Yiamouyiannis, an American who has campaigned hard to stop this public health measure not only in the United States but in other countries such as Britain. During 1993, Yiamouyiannis was given considerable air time by the BBC, appearing on its prestigious You and yours and Nature programmes where he denigrated the efforts of local health authorities to reduce tooth decay by means of fluoridating their water supplies. His dramatic claims about fluoridation--in particular, that it increases people's risk of dying of cancer--must understandably alarm those who take them at face value. So just who is John Yiamouyiannis? And do his allegations hold up? This review of his career is based on publicly documented records and statements.
A series of tap water samples were collected from residents in various areas of Los Angeles County. Three samples were collected each week over a period of three weeks, for a total of nine samples from each of the 45 residences. Samples were analyzed for fluoride content, and the data compared to information received from the agencies supplying the source water. Fluoride levels varied an average of .11 ppm during the three-week collection period; mean levels were consistently higher than values reported by the various agencies.