Radioactivity and food choice: risk factors and perception

A preceding study revealed much difference among a selected number of radioisotopes in the passing of the food chains. The present study confirms the possibility to reduce radioactivity intake by a careful food choice. The physiology of metabolism of 131I, 90Sr and 137Cs, and other radionuclides is shortly recapitulated. Discrimination and speciation are seen to be main factors in reduction or enrichment in animal food products. Several calculations are given relating intake of radioactivity and food sources. Risk factors are mentioned, as well as the psychology around them. Although it is not urgent, it seems possible to reduce the intake of radioactivity by individuals, mainly by preference for animal products (except milk during the first weeks of a nuclear incident), and by consumption of refined food instead of 'health products'. For mankind as a whole, the popular conceptions about risk and health food need to be studied first and to be redressed, eventually. 13 refs.; 1 figure; 3 tabs