title: [Biological quality of a milk substitute for school children based on refined flour subjected to enzymatic hydrolysis].
abstract: The biological quality of an experimental milk substitute based on a raw wheat flour subjected to enzymatic hydrolysis in comparison to a control product based on extruded flours and milk protein was studied in 35 <<healthy>> female school age children. The girls were fed their customary diet during 2 consecutive 14 and 12 day periods, and randomized to the experimental and control products in a double blind crossover fashion. Apparent absorption of protein, energy, calcium and phosphorus was evaluated. Mean nitrogen intake from the experimental product was significantly lower (223 vs 244 mg/Kg/d p<0.0001). Absorbed nitrogen was also lower (187 vs 203 mg&kg/d p<0.0001). Energy intake and excretion were similar with both products; 96 and 95% of intake was absorbed for experimental and control products respectively. The mean calcium intake was significantly lower than the experimental product (39.7 vs 60.2 mg/kg/d p<0.0001). Absorbed calcium from the experimental product was 50% of control (20.7 vs. 39.5 mg/Kg/d p<0.0001). Phosphorus intake was also lower with the experimental product relative to control (22.0 vs 27.8 mg/Kg/d p<0.0001) and absorbed P was 13.1 vs 16.5 mg/Kg/d respectively. Both products were well tolerated. We conclude that the experimental product based on wheat flour does not differ significantly in protein and energy digestibility but calcium and phosphorus absorption and digestibility are significantly lower limiting its use in school feeding programs.
authors.affiliation: Unidad de Nutrición Clínica, Instituto de Nutrición y Tecnología de los Alimentos, Universidad de Chile.
authors.forename: G
authors.initials: G
authors.lastname: Barrera
authors.forename: V
authors.initials: V
authors.lastname: Gattas
authors.forename: R
authors.initials: R
authors.lastname: Uauy
mesh_terms: D000818:Animals; D000886:Anthropometry; D001682:Biological Availability; D002118:Calcium / Q000378:metabolism; D002648:Child; D002664:Child Nutritional Physiological Phenomena; D004311:Double-Blind Method; D005260:Female; D005527:Food, Fortified / Q000032:analysis*; D006801:Humans; D006868:Hydrolysis; D008892:Milk; D008894:Milk Proteins / Q000378:metabolism; D010758:Phosphorus / Q000378:metabolism
chemical_list: D008894:Milk Proteins; D010758:Phosphorus; D002118:Calcium
vernacular_title: Evaluación biológica de un sustituto lácteo para el escolar, a base harina de trigo cruda refinada, sometida a hidrólisis enzimática.