运用稳定同位素技术研究中国老年人群从典型膳食中吸收锌的情况。

Zinc Absorption from Representative Diet in a Chinese Elderly Population Using Stable Isotope Technique.

作者信息

Li Ya Jie, Li Min, Liu Xiao Bing, Ren Tong Xiang, Li Wei Dong, Yang Chun, Wu Meng, Yang Lin Li, Ma Yu Xia, Wang Jun, Piao Jian Hua, Yang Li Chen, Yang Xiao Guang

机构信息

Key Laboratory of Trace Element Nutrition, National Health and Family Planning Commission of China, Department of Trace Element Nutrition, National Institute for Nutrition and Health, Chinese Center for Disease Control and Prevention, Beijing 100050, China.

National Institute of Metrology, Beijing 100029, China.

出版信息

Biomed Environ Sci. 2017 Jun;30(6):391-397. doi: 10.3967/bes2017.052.

DOI:10.3967/bes2017.052

PMID:28705262

Abstract

OBJECTIVE

To determine the dietary zinc absorption in a Chinese elderly population and provide the basic data for the setting of zinc (Zn) recommended nutrient intakes (RNI) for Chinese elderly people.

METHODS

A total of 24 elderly people were recruited for this study and were administered oral doses of 3 mg 67Zn and 1.2 mg dysprosium on the fourth day. The primary macronutrients, energy, and phytic acid in the representative diet were examined based on the Chinese National Standard Methods. Fecal samples were collected during the experimental period and analyzed for zinc content, 67Zn isotope ratio, and dysprosium content.

RESULTS

The mean (± SD) zinc intake from the representative Chinese diet was 10.6 ± 1.5 mg/d. The phytic acid-to-zinc molar ratio in the diet was 6.4. The absorption rate of 67Zn was 27.9% ± 9.2%. The RNI of zinc, which were calculated by the absorption rate in elderly men and women, were 10.4 and 9.2 mg/d, respectively.

CONCLUSION

This study got the dietary Zn absorption in a Chinese elderly population. We found that Zn absorption was higher in elderly men than in elderly women. The current RNI in elderly female is lower than our finding, which indicates that more attention is needed regarding elderly females' zinc status and health.

摘要