Vitamin and mineral deficiencies, particularly those of iron, vitamin A and zinc, affect more than two billion people worldwide. Infants and young children are highly vulnerable because they grow rapidly and often have diets low in these nutrients. Micronutrient powders are single-dose packets containing multiple vitamins and minerals in powder form that can be sprinkled onto any semi-solid food immediately before eating at home or at any other place. Thus, this intervention is known as home or point of use fortification.
Led by Luz Maria De-Regil, a team of researchers set out to see whether using micronutrient powders could improve the health of young children. They found eight relevant trials that together involved 3748 children living in Asia, Africa and the Caribbean, where anaemia is a public health problem. The studies lasted between two and 12 months and the powder formulations contained between five and 15 nutrients.
Overall, home fortification with the micronutrient powders reduced the risk of having anaemia by 31% and iron deficiency by 51% when compared with no intervention or placebo. The team found, however, that there was little or no evidence that this intervention has an effect on growth, survival or overall developmental outcomes. "We still need to know more about possible positive and adverse side effects as only a few trials reported on this," says De-Regil, who is an Epidemiologist at the Department of Nutrition for Health and Development of the World Health Organization in Geneva, Switzerland.
The researchers also found that these powders had a very similar effect to daily iron supplements. However, as they report, "We need to treat this result with caution, however, because there was much less data for this comparison."
e-Library of Evidence for Nutrition Actions (eLENA)
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