Effect of Consuming Vitamin A-fortified Sugar on Serum Retinol Levels in Children

The increase in vitamin A deficiency (\<20 mcg/dL) among children under five in Colombia (2010-2015) is a public health problem (27.3%). The objective of this randomized, controlled, double-blind clinical trial was to determine whether daily consumption of retinol-fortified sugar (23.5 mcg ER/day) was effective in treating this deficiency in children; furthermore, to evaluate whether daily sugar consumption (13 g/day) increased excess weight (P/T: overweight and obesity) in them. The main questions were: * Does daily consumption of retinol-fortified sugar (23.5 mcg ER/g) significantly increase serum retinol levels in children in the intervention group during the study? * What is the increase in weight-for-height among study participants at the end of the intervention following daily consumption of sugar in various meals throughout the day? The researchers compared daily consumption of retinol-fortified sugar over three months with daily consumption of regular sugar or a placebo to determine whether the fortified sugar was effective in increasing serum retinol levels in children in the intervention group and, furthermore, whether the increase in weight-for-height among participants at the end of the study showed no statistically significant differences compared to baseline. Participants were required to: * Children undergo antiparasitic treatment at each school with 400 mg of albendazole before starting the sugar intervention, in the presence of a nutritionist from the team. * The nutritionist be able to assess the children's anthropometric indicators at the beginning and end of the study to evaluate changes in the presence of undernutrition or excess weight (overweight and obesity). * Caregivers must allow the collection of two 5-ml blood samples: the first to assess baseline serum levels of retinol and CRP before the intervention; and the second and final sample at the end of the intervention to measure the levels of retinol and CRP achieved during the study th