Abstract
SummaryUltra Rice® is an extruded, reformed rice grain used as a carrier for micronutrients. It holds great promise for alleviating micronutrient deficiencies in populations that consume rice‐based diets. We investigated the stability of multiple‐fortified Ultra Rice® formulations in an effort to develop a stable premix containing iron, zinc, and B vitamins. The performance of four iron sources was tested under accelerated storage conditions (40 °C, 60% RH) over a period of 32 weeks. The effects of the iron source on micronutrient retention, oxidative stability, and sensory/physical properties were measured. Formulations containing ferric pyrophosphate (FePP) were the most stable, showing minimal losses of thiamin and good sensory/physical properties. Formulations containing ferrous fumarate lost more than 50% thiamin, while those containing iron‐sodium‐EDTA showed minimal loss of thiamin but developed the most rancidity. FeNaEDTA and ferrous fumarate resulted in darker coloured grains but they had a much higher in vitro bioavailability than the formulations containing FePP. The concentrations of zinc, folic acid, and niacinamide were not affected by the presence of iron during the storage tests.
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