北京市机关职工及托幼儿童每日硒摄入量的评价

北京市内居民平均每日膳食硒摄入量为66.4μg,托幼儿童为34.7μg,已达到目前的推荐膳食供给量标准。在成人膳食中,硒主要来源于谷类,占摄入量的63.6％,其次是动物性食品,占25.9％,其它植物性食品占10.5％;儿童膳食硒主要来源于谷类和动物性副食,各占48.9％和44.3％。 全血平均硒含量为0.146ppm,发硒含量0.578ppm。全血硒和发硒含量与每日膳食硒摄入量间均呈显著的正相关。 汞、砷及镉的每日摄入量分别为3.4,52.7和42.7μg,未超过正常地区的允许范围,不致于显著增加硒的需要量。 由于调查对象硒的营养状况正常,且每日摄入的拮抗元素为量不多,故所调查出的每日硒摄入量应为我国健康人的正常摄入量,可供制定供给量时参考。

COMMENT ON THE DAILY SELENIUM INTAKE OF STAFF AND CHILDREN OF NURSERY AND KINDERGARTEN IN BEIJING

The average daily selenium intake of staff of the Institute of Health in Beijng was surveyed to be 66.4μg and that of children in nursery and kindergarten was 34.7μg, which could meet the Recommended Dietary Allowance as suggested. Cereals were the major source of dietary selenium which accounted for 63.6% of total dietary intake, and animal and plant foods provided about 25.9% and 10.5% respectively. Both cereals and animal foods were the major sources of selenium in children diet, which accounted for 48.9% and 44.3% respectively, and intake of selenium from other sources was negligible.The selenium concentrations in whole blood and hair of the population were 0.146ppm and 0.578ppm respectively, and both correlated well with the daily selenium intake.The daily intake of mercury, arsenic, and cadmium for population in Beijing were estimated to be 3.4, 52.7, and 42.7*g respectively, which were within the normal range of intake and would not significantly interfere with the bioavailability of selenium ingested. It was suggested thal these levels of selenium daily intake surveyed would be adequate for human consumption and could be helpful as a reference for the establishment of dietary allowance.