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Vitamin A-fortified cooking oil reduces vitamin A deficiency in infants, young children and women: results from a programme evaluation in Indonesia

Abstract Objective To assess oil consumption, vitamin A intake and retinol status before and a year after the fortification of unbranded palm oil with retinyl palmitate. Design Pre–post evaluation between two surveys. Setting Twenty-four villages in West Java. Subjects Poor households were randomly sampled. Serum retinol (adjusted for subclinical infection) was analysed in cross-sectional samples of lactating mothers (baseline n 324/endline n 349), their infants aged 6–11 months (n 318/n 335) and children aged 12–59 months (n 469/477), and cohorts of children aged 5–9 years (n 186) and women aged 15–29 years (n 171), alongside food and oil consumption from dietary recall. Results Fortified oil improved vitamin A intakes, contributing on average 26 %, 40 %, 38 %, 29 % and 35 % of the daily Recommended Nutrient Intake for children aged 12–23 months, 24–59 months, 5–9 years, lactating and non-lactating women, respectively. Serum retinol was 2–19 % higher at endline than baseline (P<0·001 in infants aged 6–11 months, children aged 5–9 years, lactating and non-lactating women; non-significant in children aged 12–23 months; P=0·057 in children aged 24–59 months). Retinol in breast milk averaged 20·5 μg/dl at baseline and 32·5 μg/dl at endline (P<0·01). Deficiency prevalence (serum retinol <20 μg/dl) was 6·5–18 % across groups at baseline, and 0·6–6 % at endline (P≤0·011). In multivariate regressions adjusting for socio-economic differences, vitamin A intake from fortified oil predicted improved retinol status for children aged 6–59 months (P=0·003) and 5–9 years (P=0·03). Conclusions Although this evaluation without a comparison group cannot prove causality, retinyl contents in oil, Recommended Nutrient Intake contributions and relationships between vitamin intake and serum retinol provide strong plausibility of oil fortification impacting vitamin A status in Indonesian women and children.