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Zinc Fractional Absorption from a Representative Diet in Young Chinese Men and Women of the Shandong Rural Region

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Abstract

The objective of this study was to investigate the zinc fractional absorption of young Chinese men and women from the Shandong rural region under the routine dietary pattern by stable isotope technique. Ten men and 10 women, aged 20 to 35 years, and with a representative diet during the experiment were recruited from the Shandong rural region. Stable 67Zn was used as a tracer to label ZnCl2, and Yb was used to monitor the excretion of 67Zn in urine and feces. All volunteers were given rice containing 4.0 mg 67Zn and 1.0 mg Yb on the fourth day. Then the food and fecal samples of all subjects were collected for 12 consecutive days. The total zinc and the stable zinc isotope ratio of all samples were determined by atomic absorption spectrophotometer and thermal ionization mass spectrometer, respectively. The determination of the other nutrients was performed based on the Chinese National Standard Methods. Among volunteers, the daily intake of zinc was 15.50 mg, 103.33 % of recommended nutrient intake (RNI, set by the Chinese Nutrition Society) in men and 15.43 mg, 134.17 % in women. The fractional absorption of Zn was 23.42 ± 2.23 % in men, and 22.49 ± 2.19 % in women. The protein candidates got from the typical diets was 93.96 % of RNI in women. Calcium and ascorbic acid intakes were 76.23 % of RNI and 27.91 % of RNI in men, respectively and 51.17 % of RNI and 34.23 % of RNI in women, respectively. Our results showed that a typical meal for someone in the Shandong rural region presented an adequate intake of zinc and a moderate Zn bioavailability. The shortage of protein and the inappropriate protein pattern may play important roles in reducing zinc bioavailability.

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Acknowledgments

This work was sponsored by the National Natural Science Foundation of China (No. 39930150) and Natural Science Foundation of Shandong province, China (No.Y2003C092).

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Authors and Affiliations

  1. Department of Nutrition and Food Hygiene, School of Public Health, Shandong University, 44 Wenhuaxi Road, Jinan, 250012, China

    Cuiping Wang, Xinying Lin & Guifa Xu

  2. Department of Chemistry and Bacteria Detection, School of Public Health, Shandong University, Jinan, China

    Dongmei Guo & Xi Cui

  3. Nutrition Department, Beijing Hospital, Beijing, China

    Lili Ding

  4. China Nutrition and Health Food Association, Beijing, China

    Haifeng Guo

  5. Department of Maternal and Child Health Care, School of Public Health, Shandong University, 44 Wenhuaxi Road, Jinan, 250012, China

    Xia Wang

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  1. Cuiping Wang
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Correspondence to Xinying Lin or Xia Wang.

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Wang, C., Lin, X., Guo, D. et al. Zinc Fractional Absorption from a Representative Diet in Young Chinese Men and Women of the Shandong Rural Region. Biol Trace Elem Res 177, 16–24 (2017). https://doi.org/10.1007/s12011-016-0865-2

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