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It is said that Japan is the only non-goiterous conutry. This study is to estimate theiodine intake of Japanese. The daily iodine content in Japanese diets was about 200γ-20mg. The daily urinary excretion of iodine was about 200γ-7mg. Wide individual variationswere due to differences in seaweeds intake. From these results the iodine intake of Japanese is generally estimated to be about 500-1000γ or more daily. This value seemedto be very high than that of any other countries.
Katsura et al. (Fri,) studied this question.