Dietary studies of children from a biracial population: intakes of vitamins in 10- and 13-year-olds.

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Abstract
Impact of vitamin supplements upon dietary intakes of eight vitamins was examined in 10- and 13-year-old children randomly selected from a biracial community, Bogalusa, LA. More younger children reported taking supplements daily (17%) than did adolescents (12%). Over 90% of the children surveyed had dietary intakes of vitamin E and niacin that met or exceeded the RDA. One-half to two-thirds of children using supplements had adequate intakes of ascorbic acid from diet alone. Children who most needed ascorbic acid supplements were the least likely to take them. One-quarter to one-half of the children did not consume the RDA levels of vitamin A, thiamine, and riboflavin. Adolescents had less adequate vitamin A intakes than younger children. In all surveys, a higher proportion of girls than boys had intakes that did not meet the RDA for vitamins B6 and B12. Vitamin intakes of Bogalusa children and adolescents were comparable to other U.S. surveys. Inclusion of vitamin E and niacin in supplements may be unnecessary.