RESUMO
With a well-balanced diet containing 1.3 mg of retinol/kg, a limited quantity of acid casein (10%) provokes a maximal efficiency of retinol. At a rate of 5% or 25% of casein, the retinol efficiency is decreased and identical to that of soybean diets. In casein-soybean mixed diets, the variations of retinol efficiency are only imputable to the casein presence. With diets containing 6.5 mg of retinol/kg, the specific effect of casein disappears.
Assuntos
Caseínas/farmacologia , Proteínas Alimentares/administração & dosagem , Glycine max , Proteínas de Vegetais Comestíveis/farmacologia , Vitamina A/metabolismo , Animais , Fígado/efeitos dos fármacos , Fígado/metabolismo , Masculino , Ratos , Ratos Endogâmicos , Proteínas de Soja , Vitamina A/farmacologiaRESUMO
In comparison with soybean proteins, the acid casein increases the blood and liver concentrations of retinol when the diet contains 1 mg of retinol/kg. The effect of the acid casein is more important when the vitamin A is supplied to rats as retinal: with the alcohol form, the amount of liver retinol is 88.7 micrograms; with the aldehyde form, it reaches 137 micrograms.
