In 2007, SIGHT AND LIFE’s literature digest shifted from a predominant focus on vitamin A to a wider coverage of all the micronutrients. This broadening of focus was not because vitamin A is no longer important but because we now recognize that vitamin A deficiency does not occur alone. Malnutrition has multifactorial origins and, in general, people who lack vitamin A also lack food both in quantity and quality. A poor-quality diet is very likely to be deficient in not just one but several nutrients and micronutrients. Hence, dietary intervention with just one micronutrient may not only be short-sighted but potentially harmful. Supplying just one micronutrient may only replenish one set of needs while exposing another. However, too much of one nutrient could also antagonize the absorption of another and worsen an already fragile nutritional situation.
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