Nutr Res Pract.  2023 Dec;17(6):1211-1224. 10.4162/nrp.2023.17.6.1211.

Food sources of zinc and nutritional status with usual dietary zinc intake in Korean toddlers and preschool children

• Song S
• Shim JE

• KMID: 2548887
• DOI: http://doi.org/10.4162/nrp.2023.17.6.1211

Abstract

BACKGROUND/OBJECTIVES
This study aimed to evaluate the food sources of zinc and the usual intake of dietary zinc among Korean toddlers and preschool children.
SUBJECTS/METHODS
A total of 2,679 children aged 1–5 years was selected from the 2009– 2013 Korea National Health and Nutrition Examination Survey (KNHANES) data. Dietary data collected from a single 24-h recall were used to evaluate the food sources of zinc. To estimate usual zinc intake, the distribution obtained from single 24-h recall data in the total sample was adjusted using the ratio of within-to-between-person variance in zinc intake obtained from 2-day 24-h recall sub-sample data of the 2009 KNHANES. The proportion of children with usual zinc intake below the estimated average requirement (EAR) and above the tolerable upper intake level (UL) was assessed.
RESULTS
The main sources of zinc in Korean children were grains, dairy products, and meat. The mean usual intakes of zinc among all individuals, those aged 1–2 yrs, and those aged 3–5 yrs were 5.50, 5.01, and 5.83 mg/d, respectively. In all participants, 1.1% of the children consumed zinc below the EAR, whereas 10.7% exceeded the UL. The proportion of children with excessive zinc intake was 25.6% in the 1–2 yrs age group and 0.6% in the 3–5 yrs age group.
CONCLUSIONS
According to the current UL, the risk of excessive zinc intake appears to be high among Korean toddlers. Future studies that monitor the health effects of excessive zinc intake are needed to appropriately guide zinc intake in children.

Keyword

Zinc; nutritional status; diet; child; micronutrients

Figure

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  Fig. 1 Flowchart for the selection of studies on the ratio of within- to between-person variance of zinc intake among young children.

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