Artículos de revistas
Retinol Blood Levels In High School Students Of São Paulo, Brazil [retinol Sérico De Adolescentes De Uma Escola Da Cidade De São Paulo]
Registro en:
Revista De Nutricao. , v. 17, n. 3, p. 291 - 299, 2004.
14155273
2-s2.0-7544247849
Autor
Vitolo M.R.
Gama C.M.
De Souza Queiros S.
Lopez F.A.
Colugnati F.A.B.
Institución
Resumen
Objective: The purpose of the study was to examine plasma retinol levels in 218 adolescents of both sexes, ages 10 to 19 years old. All the subjects attended a private high school in the city of São Paulo. Methods: In order to evaluate the students' nutritional condition, the researchers performed anthropometrical measurements - weight and height - in addition to investigating the subjects' diet history. The retinol level was measured through the spectrophotometer technique, considering as inadequate values of concentration under <1.05μmol/L (30μg/dL). Results: The results indicate that the average intake, according to the age range, was higher than recommended, even though presenting high deviation patterns for both genders. The percentage of teenagers with plasma concentrations of vitamin A under the adequate level was 30% for both genders, and neither the analysis of the correlation between Body Mass Index and plasma concentrations of retinol, nor the analysis of the correlation between the density of vitamin A intake and plasma concentration of retinol, were significant. Conclusion: The research findings point out to the need for further investigation of vitamin A concentrations during adolescence, in order to check more accurately whether the low plasma concentration of this nutrient should be considered a risk factor, or the result of the accelerated absorption which takes place in adolescence to fulfill the metabolic requirements characteristic of this period of human growth. 17 3 291 299 West Jr., K.P., Dietary vitamin A deficiency: Effects on growth, infection, and mortality (1991) Food Nutr Bull, 13, pp. 119-131 Evaion-Brior, D., Porquet, D., Therrond, P., Paulsen, A.F., Grenede, M.O., François, L., Vitamin A and nocturnal growth hormone secretion in short children (1994) Lancet, 343, pp. 87-88 Herberth, B., Spyckerelle, Y., Deschamps, J.P., Determinants of plasma retinol b-carotenoid and a-tocopherol during adolescence (1991) Am J Clin Nutr, 54, pp. 884-889 Brabin, L., Brabin, B., The cost successful adolescent growth and development in girls in relation to iron and vitamin A status (1992) Am J Clin Nutr, 55 (5), pp. 955-958 (2000) Dietary Assessment, , Washington, DC: The Nacional Academy Press Gama, C.M., (1999) Consumo Alimentar e Estado Nutricional de Adolescentes Matriculados na Rede de Ensino Particular e Pública do Bairro de Vila Mariana da Cidade de São Paulo, São Paulo, , [tese]. 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