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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。
The average daily intake of dietary selenium in Beijing residents was 66.4 μg, while that of kindergartens and nurseries was 34.7 μg. The current recommended dietary supplement level has been reached. In adult diets, selenium mainly comes from cereals, accounting for 63.6% of the total intake, followed by animal foods, accounting for 25.9% and other plant foods accounting for 10.5%. Children’s dietary selenium mainly comes from cereals and animal non-staple foods, Accounting for 48.9% and 44.3%. Whole blood average selenium content of 0.146ppm, selenium content 0.578ppm. There was a significant positive correlation between selenium content in selenium and selenium in daily diet and dietary selenium intake. The daily intake of mercury, arsenic and cadmium were 3.4, 52.7 and 42.7 μg respectively, which did not exceed the allowable range of the normal area, so as not to significantly increase the requirement of selenium. As the nutritional status of the normal selenium and daily intake of antagonistic elements is small, so the daily intake of selenium should be investigated for the normal intake of healthy people in our country, for the provision of supply reference.