title: Zinc Fractional Absorption from a Representative Diet in Young Chinese Men and Women of the Shandong Rural Region.
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. Stable67Zn was used as a tracer to label ZnCl2, and Yb was used to monitor the excretion of67Zn in urine and feces. All volunteers were given rice containing 4.0 mg67Zn 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.
authors.affiliation: Department of Nutrition and Food Hygiene, School of Public Health, Shandong University, 44 Wenhuaxi Road, Jinan, 250012, China.
authors.forename: Cuiping
authors.initials: C
authors.lastname: Wang
authors.affiliation: Department of Nutrition and Food Hygiene, School of Public Health, Shandong University, 44 Wenhuaxi Road, Jinan, 250012, China. xinyingll@sdu.edu.cn.
authors.forename: Xinying
authors.initials: X
authors.lastname: Lin
authors.affiliation: Department of Chemistry and Bacteria Detection, School of Public Health, Shandong University, Jinan, China.
authors.forename: Dongmei
authors.initials: D
authors.lastname: Guo
authors.affiliation: Nutrition Department, Beijing Hospital, Beijing, China.
authors.forename: Lili
authors.initials: L
authors.lastname: Ding
authors.affiliation: China Nutrition and Health Food Association, Beijing, China.
authors.forename: Haifeng
authors.initials: H
authors.lastname: Guo
authors.affiliation: Department of Nutrition and Food Hygiene, School of Public Health, Shandong University, 44 Wenhuaxi Road, Jinan, 250012, China.
authors.forename: Guifa
authors.initials: G
authors.lastname: Xu
authors.affiliation: Department of Chemistry and Bacteria Detection, School of Public Health, Shandong University, Jinan, China.
authors.forename: Xi
authors.initials: X
authors.lastname: Cui
authors.affiliation: Department of Maternal and Child Health Care, School of Public Health, Shandong University, 44 Wenhuaxi Road, Jinan, 250012, China. wangxiaes@sdu.edu.cn.
authors.forename: Xia
authors.initials: X
authors.lastname: Wang
mesh_terms: D065567:Absorption, Physiological; D000328:Adult; D001682:Biological Availability; D002681:China; D004032:Diet; D005260:Female; D006801:Humans; D008297:Male; D009751:Nutritional Requirements; D009752:Nutritional Status; D055815:Young Adult; D015032:Zinc / Q000008:administration & dosage / Q000378:metabolism*
chemical_list: D015032:Zinc
keywords: Representative diet of northern China; Stable isotope; Zinc bioavailability