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Title: Maternal zinc status is associated with breast milk zinc concentration and zinc status in breastfed infants aged 4-6 months
Authors: Oraporn Dumrongwongsiri
Umaporn Suthutvoravut
Suthida Chatvutinun
Phanphen Phoonlabdacha
Areeporn Sangcakul
Artitaya Siripinyanond
Usana Thiengmanee
Nalinee Chongviriyaphan
Mahidol University
Keywords: Medicine
Issue Date: 1-Jan-2015
Citation: Asia Pacific Journal of Clinical Nutrition. Vol.24, No.2 (2015), 273-280
Abstract: Breast milk provides adequate nutrients during the first 6 months of life. However, there are some reports of zinc deficiency in breastfed infants. This study was conducted to determine the prevalence of zinc deficiency in infants aged 4-6 months and the associated factors. Healthy infants aged 4-6 months and their mothers were enrolled. They were classified by feeding types as breastfed (BF), formula-fed (FF), and mixed groups (MF). Data collection included demographic data, perinatal data, given diets, and anthropometric measurement. Blood from infants and lactating mothers, and breast milk samples were collected to assess plasma and breast milk zinc concentrations. From 158 infants, the prevalence of zinc deficiency (plasma level below 10.7 μmol/L) was 7.6%, and according to feeding groups 14.9%, 5.3%, and 2.9% in the BF, the FF, and the MF groups, respectively. Breastfed infants with zinc deficiency had significantly lower maternal zinc concentrations compared with those without zinc deficiency. There was a higher proportion of maternal zinc deficiency in zinc-deficient infants than those without zinc deficiency (66.7% vs 16.2%, p=0.02). There was a positive correlation between zinc concentrations in breast milk and plasma zinc concentrations of infants (r=0.62, p=0.01) and plasma zinc concentrations of lactating mothers (r=0.56, p=0.016). Using the regression analysis, infant zinc status was associated with maternal plasma zinc concentrations among breastfed infants. The results of this study suggest that breastfed infants aged 4-6 months may have a risk of zinc deficiency and that risk is associated with maternal zinc status and breast milk zinc concentrations.
ISSN: 09647058
Appears in Collections:Scopus 2011-2015

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