RESUMO
Zinc absorption during pregnancy was measured before and 24 h after 2 wk of daily, oral, iron-folate supplements. Absorption was reduced 24 h after iron-folate, which suggests a mucosal rather than a luminal effect. Also, zinc absorption in 10 healthy volunteers was reduced by folate supplements alone. Therefore, routine iron and folate supplementation may both have deleterious effects on zinc metabolism, especially during pregnancy when iron-folate supplements are often prescribed despite adequate dietary intakes of iron and folate but not of zinc.
Assuntos
Ácido Fólico/efeitos adversos , Absorção Intestinal/efeitos dos fármacos , Ferro/efeitos adversos , Gravidez/metabolismo , Zinco/metabolismo , Adulto , Feminino , Ácido Fólico/administração & dosagem , Humanos , Ferro/administração & dosagem , Masculino , Valor Nutritivo/efeitos dos fármacos , Zinco/administração & dosagemRESUMO
Nutritional factors associated with intrauterine growth retardation (IUGR) were studied in 118 mothers, from an inner London population, 24-48 h after delivery. Lower socio-economic status, smoking and, in the diet, only a low dietary intake of zinc were significantly associated with IUGR. It is suggested that women at risk of delivering babies small-for-gestational-age might benefit from an increased zinc intake.
Assuntos
Retardo do Crescimento Fetal/etiologia , Fenômenos Fisiológicos da Nutrição , Zinco/deficiência , Adulto , Feminino , Humanos , Recém-Nascido , Londres , Estado Nutricional , Gravidez , Fumar , Fatores Socioeconômicos , Zinco/administração & dosagemRESUMO
The baboon is the only animal in which alcoholic fibrosis and cirrhosis of the liver has been produced with a nutritionally adequate diet. Zinc deficiency is associated with alcoholic liver disease and may contribute to liver damage. We have therefore investigated whether zinc supplementation would reduce liver damage in ten baboons receiving ethanol and an adequate diet. Eight received ethanol at up to 25 g/kg/day (70% of calories) for up to 60 months (four were supplemented with 50 mg zinc/day). All animals gained weight, and blood concentrations of ethanol were 63-342 mg/dl. Changes in liver blood tests were slight. Liver histology only showed fatty change in six animals, severe in two, and minor inflammatory changes but no significant fibrosis or cirrhosis. In one of the animals with severe fatty change there were also degenerative changes in parenchymal cells. There was thus no significant hepatic fibrosis or cirrhosis in baboons given large amounts of ethanol and an adequate diet for up to 5 years.