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

Ya Jie LI; Min LI; Xiao Bing Liu; Tong Xiang Ren; Wei Dong LI; Chun Yang; Meng WU; Lin Li Yang; Yu Xia MA; Jun Wang; Jian Hua Piao; Li Chen Yang; Xiao Guang Yang

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

Author: Ya Jie LI ¹ ; Min LI ¹ ; Xiao Bing LIU ¹ ; Tong Xiang REN ² ; Wei Dong LI ¹ ; Chun YANG ³ ; Meng WU ¹ ; Lin Li YANG ¹ ; Yu Xia MA ⁴ ; Jun WANG ² ; Jian Hua PIAO ¹ ; Li Chen YANG ¹ ; Xiao Guang YANG ¹
Author Information

1. 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.
2. National Institute of Metrology, Beijing 100029, China.
3. 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
4. HeBei Medical University, Shijiazhuang 050017, Hebei, China.
Publication Type:Journal Article
Keywords: Chinese elderly people; Stable isotope technique; Zinc absorption
MeSH: Aged; Asian Continental Ancestry Group; Biological Availability; China; Diet; Dysprosium; Elements; Feces; chemistry; Female; Humans; Intestinal Absorption; Male; Meals; Middle Aged; Nutritional Physiological Phenomena; Zinc; chemistry; pharmacokinetics; Zinc Isotopes
From: Biomedical and Environmental Sciences 2017;30(6):391-397
CountryChina
Language:English
Abstract:
OBJECTIVETo 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.
METHODSA 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.
RESULTSThe 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.
CONCLUSIONThis 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.