藏族成年男子膳食中锌的吸收状况研究

贾青; 黄承钰; 周继昌

doi:10.11847/zgggws2005-21-08-17

藏族成年男子膳食中锌的吸收状况研究

Study on zinc absorption and utilization from diet in Tibetan male adults

摘要

摘要:
目的了解藏族成年男子膳食中锌的吸收利用, 为修订膳食营养素参考摄入量(DRIs)和改善锌的营养状况提供理论依据。
方法在营养调查的基础上设计出代表性的3d食谱, 选择13名18~19岁的藏族健康男子给予试验膳进行14d的代谢平衡实验, 收集试验期受试者的膳食、饮水、粪便、尿液样品, 采用火焰原子吸收光谱法测定各样品中锌的含量, 计算锌的表观吸收率、表观利用率。
结果锌的表观吸收率为24.15%, 与现行的DRIs的制订依据估计值接近; 表观利用率为7.61%。
结论代表性膳食中锌的摄入量能满足受试者的需要量。

Abstract:
Objective In order to determine zinc absorption and utilization from diet in Tibetan male adults, and to lay a foundation for the revision of Chinese Dietary Reference Intakes(DRIs)and improvement of zinc nutrition.
Methods Thirteen Tibetan healthy menaged eighteen~nineteen were selected to take part in a fourteen day metabolic balanced experiment, and to be served a three day representative dietafter the nutritional survey.During the experimental days, test meals, water, feces and uine were collected.Zinc content in the above samples was deter mined by means of flameatomabsor ption spectrum(AAS).Then zinc apparent absorption and apparent utilization were calculated.
Results Zinc apparentabsor ption and apparent utilization was 24.15 and 7.61 percent respectively, and the former was quite close to the estimated value of present DRIs foundation.
Conclusion Zinc intake from repr esentativediet could meet the requirement of the subjects.

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