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Effects of airborne fluoride on the fluoride content of rice and vegetables



Effects of airborne fluoride on the fluoride content of rice and vegetables



Fluoride 16(3): 175-180



The 3 most important sources of fluoride [F-] intake are water, air and food. Since currently fluoridation is not being practiced in Japan, F- is consumed mainly from food. The staple food in Japan is rice, the present study was undertaken to determine the F- content in rice and vegetables from a control area free of sources of F- emission and from exposed areas near factories emitting F- into the atmosphere. Normal values of the F- content in rice ranged from 0.5-1.5 ppm, those of green vegetables from 1.0-1.5 ppm. The daily F- intake from food by Japanese adults was estimated at 1.1-1.3 mg. Assuming that a person ingested polished rice, the F- content of which was 19 ppm in the environs of a ceramics factory, intake of F- from rice alone was estimated to be 0.6-1.0 mg higher than normal.

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Accession: 001351627

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