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Absorption of zinc from mixed diets containing conventional or zinc‐biofortified Bangladeshi rice, or conventional Bangladeshi rice with added zinc, among young children in a peri‐urban community
Author(s) -
Islam M Munirul,
Woodhouse Leslie R,
Hossain Mohammad Bakhtiar,
Ahmed Tahmeed,
Huda Nazmul,
Ahmed Tanveer,
Hotz Christine,
Brown Kenneth H
Publication year - 2011
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.25.1_supplement.96.7
Subject(s) - zinc , bioavailability , chemistry , zoology , atomic absorption spectroscopy , biofortification , food science , biology , bioinformatics , physics , organic chemistry , quantum mechanics
Rice cultivars with higher Zinc (Zn) contents have been produced through selective breeding, and in vivo Zn bioavailability information is needed. We measured fractional (FAZ) and total Zn absorption (TAZ) from mixed diets containing zinc‐biofortified rice (ZnBfR) compared with diets containing conventional rice (CR), with or without added Zn in children using a triple stable isotope technique. Healthy children (n=42; 36–59 mo) were recruited and divided equally into 2 groups. In a randomized 2 day cross‐over design, Group A received 150 g of ZnBfR ( 67 Zn) for 1 day (4.97 mg total Zn intake), and 150 g CR ( 70 Zn) on the other day (3.93 mg total Zn intake). Group B received 150 g of ZnBfR ( 67 Zn) for 1 day, and 150 g CR ( 70 Zn) with added ZnCl 2 (CR+Zn) on the other day (5.85 mg total Zn intake). Mixed diets were served 3 times daily. 68 Zn was infused intravenously at the end of day 2. Urine samples were collected on day 6–10, urinary Zn isolated and isotope ratios determined. Preliminary data indicate that FAZ (%) was 20.9 a ± 4.1, 26.4 b ± 4.2 and 20.2 a ± 4.2 for ZnBfR, CR and CR+Zn (p <0.05). TAZ (mg) was 1.04 a ± 0.21, 1.04 ab ± 0.17 and 1.18 b ± 0.24 for ZnBf, CR and CR+Zn diets (p <0.05). TAZ from a ZnBfR diet is as good as a diet based on CR but the amount of increased zinc intake from the ZnBfR rice may be insufficient to enhance TAZ compared with CR at the levels of consumption studied.