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Vitamin A assessment

RM Rafael Monge-Rojas
LB Luis A. Barboza
RV Rulamán Vargas-Quesada
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Dietary intake of vit-A was estimated using the database of the School of Nutrition of the University of Costa Rica [21]. Dietary intake of vit-A was determined per person per day and included vit-A from animal and vegetable sources and foods fortified with this nutrient in Costa Rica (sugar for household consumption and commercially pasteurized cow milk).

The nutritional adequacy of vit-A intake was calculated using the Estimated Average Requirement (EAR) for each category of sex and age of adolescents, according to the guidelines of the National Academy of Medicine (formerly the Institute of Medicine) of the United States [22]. Nutrient adequacy was calculated using the cut-off point method [23], as shown in Eq. 1.

The EAR cut-point method was used because all the assumptions the Institute of Medicine indicated for its use were met [24]. A vit-A percentage of EAR (%EAR) less than 100% was considered indicative of inadequate vit-A intake [24].

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