Journal
PUBLIC HEALTH NUTRITION
Volume 12, Issue 12, Pages 2329-2334Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S1368980008004357
Keywords
Vitamin D-3; Children; School; Lipids; Milk; Fortification
Funding
- Waikato Medical Research Foundation
- Waikato District Health Board
- Health Research council
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Objective: TO evaluate levels Of vitamin D-3 and HDL-cholesterol (HDL-C), and the ratio of HDL-C to LDL-cholesterol (LDL-C), in schoolchildren receiving vitamin-D-fortified, fat-depleted, high-Ca milk in schools. Design: Cross-sectional study Of previously randomised schools receiving supplemental milk, compared with a matched control group). Setting: Low-decile Year 1-6 schools in the Waikato region of New Zealand. Subjects: Year 3 children from either milk schools or control schools, consenting to blood sampling. Results: For eighty-nine children receiving supplementary daily milk, vitamin D-3 levels were significantly higher than in eighty-three control children matched for age, sex, body composition and ethnicity (mean (SD): 49.6 (15.8) v. 43.8 (14.7) nmol/l, P=0.011.), is were HDL-C levels (mean (SD): 1.47 (0.35) v. 1.35 (0.29) mmol/l, P=0.024) and (median: 0.79 v. 0.71, P=0.026). LDL-C levels were similar in both groups (mean (si)): 2.07 (0.55) v. 2.16 (0.60) mmol/l, P= 0.31). Of control children, 32/83 (38.6%)had vitamin D3 levels below the cut-off for vitamin D insufficiency (<37.5 nmol/l), compared with 18/89 (20.2%) of the milk group (Pearson's chi(2)=7.00, P=0.008). Mean 25-hydroxvitamin D (vitamin D-3) levels in the milk group were still below the lower end of the recommended normal range (60 nmol/l). Conclusions: Vitamin D-3 levels are low in low-decile Year 3 children in midwinter. Levels are improved with vitamin-D-fortified milk but still I)below the recommended range. HDL-C and HDL-C:LDL-C levels are improved in the milk-supplemented group. This supports; the supply of vitamin-d-fortified, fat-reduced milk to schools.
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