Production of Ascorbate Free Radicals in Infant Formulas and Other Media |
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| Authors: | ET CHAMPAGNE O HINOJOSA CAB CLEMETSON |
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| Affiliation: | Authors Champagne and Hinojosa are with the USDA-ARS, Southern Regional Research Center, Box 19687, New Orleans, LA 70179. Author Clemetson is with Huey P. Long Hospital, Box 5352, Pineville, LA 71361. |
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| Abstract: | The effects of pH on ascorbate free radical production in ascorbic acid-supplemented cow's milk, soy- and milk-based infant formulas and in aqueous ascorbic acid solutions were examined. Formula and milk components decreased ascorbate free radical concentrations. Ascorbate free radical levels in pepsin-hydrolyzed soy and milk formulas were no different from those of unhydrolyzed formulas. At the phytate: iron molar ratio in the formulas, phytate decreased ascorbate free radical levels in pH 2.0 and 7.0 ascorbic acid solutions containing iron by about 35% and 50%, respectively. This antioxidant effect of phytate was not observed in soy-based and phytate-spiked milk-based formulas. |
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