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  • Title: Dietary selenium intakes and plasma selenium concentrations of formula-fed and cow's milk-fed infants.
    Author: Gropper SA, Anderson K, Landing WM, Acosta PB.
    Journal: J Am Diet Assoc; 1990 Nov; 90(11):1547-50. PubMed ID: 2229850.
    Abstract:
    The plasma selenium concentrations of 57 infants 8 to 12 months of age were assessed using flameless atomic absorption spectrophotometry. The infants ingested either cow's milk or whey-predominant milk-based infant formula as their primary beverage as part of a mixed diet for at least 3 months. The calculated mean +/- standard deviation (SD) daily dietary selenium intake of 26 infants fed cow's milk (34 +/- 13 micrograms), assessed by a 3-day diet record and/or a 24-hour diet recall, was significantly (p less than or equal to .001) greater than that of 31 formula-fed infants (22 +/- 11 micrograms). The mean +/- SD plasma selenium concentration of infants fed cow's milk (39 +/- 11 micrograms/L) was also significantly (p less than or equal to .05) greater than that of infants fed formula (31 +/- 12 micrograms/L). Both groups of infants ingested similar amounts of total energy; however, the infants fed cow's milk received more total protein and selenium and a greater percentage of protein and selenium from their primary beverage than did the infants receiving formula. Both groups of infants were consuming a mixed diet with similar sources of selenium. To examine the selenium status of infants as well as other individuals better, further analysis of foods is clearly needed to provide more information on dietary selenium sources. The influence of variables such as body size and ethnicity, intake, sources and forms of dietary protein, and dietary forms of selenium on plasma selenium concentrations must also be investigated.
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