日本人の亜鉛摂取量について

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書誌事項

タイトル別名
  • Studies on Ingested Zinc Quantity of Japanese
  • ニホンジン ノ アエン セッシュリョウ ニ ツイテ

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説明

Zinc plays an important role not only as a constituent of various enzymes, but also as a necessary factor which invigorates and prolongs insulin action. The characteristic symptoms of zinc deficiency were confirmed in young persons of the United Arab Republic and Iran. The growth and development of many persons with hypogonadism was checked. On the other hand it has been known that acrodermatitis enteropathica, an inherited disease of nursing infants due to zinc deficiency, is characterized by acral eczema-like dermatitis, alopecia, and diarrhea. The acrodermatitis enteropathica like symptoms were also acknowledged to occur during prolonged parenteral alimentation, if zinc was not added to the parenteral fluid as a trace element. Our report is concerned with whether the zinc intake of Japanese is adequate or not. The following conclusions were made.<BR>1) There are many people in Japan who require fish as a protein source. Generally the zinc content of fish is not high when compared with meat. Therefore the daily zinc intake of Japanese adults dose not reach a high level. Ten typical instances of the menu from the residents in Kobe city showed us that the average adult intake of zinc per day reached only 8.9±2.5mg. This value is significantly lower than 15mg, the recommended allowance in the U.S.A. But the intake sufficiently reaches 8.0 mg that of Czechoslovakia.<BR>2) All of the milk powders specially prepared in Japan, which are used for artificial feeding, contain 0.7-0.9mg zinc per 100g and are used at a concentration of 13-14 percent. So if 180ml at one time is given to an infant of 4-6 months after birth, the intake of zinc is no more than 0.2mg. Consequently the daily intake does not reach 2mg. It has been decided that the recommended allowance of zinc for an infant up to 6 months after birth should be 3mg, and for an infant from 7 months to 12 months should be 5mg as in the U.S.A., Italy and Denmark. But in Czechoslovakia it has been decided that for an infant up to 6 months the allowance should be 5mg. As the daily zinc intake of bottle fed infants in Japan is low compared with these recommended allowances, it is necessary to increase a little the quantity of milk protein in specially prepared artificial nutriment in order to meet the recommended allowances.<BR>3) The average zinc content and its standard deviation in infant hair during delactation is 10.2±2.5mg per 100g as compared with that of adult hair, which is 30.2±15.8mg. It is significant, within a risk of 1 perrnillage, that the zinc content of infant hair is lower than that of adult hair. Therefore that the zinc content in the human body gradually increnses after birth is obvious.

収録刊行物

  • 栄養と食糧

    栄養と食糧 34 (4), 355-365, 1981

    公益社団法人 日本栄養・食糧学会

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