Other nutrients and their deficiencies that can impact iron status, utilization, or anemia include vitamin A, folate, vitamin B12, riboflavin, and ascorbic acid (vitamin C). Improving iron status can also increase the utilization of iodine and vitamin A from supplements. On the other hand, it is increasingly recognized that simultaneous provision of iron and zinc in supplements may decrease the benefit of one or both of these nutrients. These complex micro-nutrient interactions and their implications for nutritional interventions are incompletely understood but have significant implications for population-based supplementation strategies.
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