Selenium balances in young infants fed on breast milk and adapted cow's milk formula.
Selenium intake, renal and fecal excretion, and retention were determined in 11 breast-fed term infants and in 9 term infants fed with an adapted cow's milk formula. In most cases three-day-balances were determined five times at the age of 2, 5, 8, 12, and 16 weeks. Analytical determination of selenium was by atomic absorption spectroscopy with a selenium hybrid system after wet ashing of samples. The mean breast milk concentrations of selenium show a significant decrease in the course of lactation from 31.0 micrograms/L in the first collecting period to 17.6 micrograms/L in the last one. The two formula milks contained 11.8 and 7.7 micrograms/L. Intake in the breast milk group was higher than in the formula group, whereas absolute renal and fecal excretion were essentially the same. This leads to a higher selenium retention in the breast-fed infants than in the formula-fed infants, where most of the balances are negative.
Dörner
K
K
University Children's Hospital Kiel, Fed. Rep. of Germany.
Schneider
K
K
Sievers
E
E
Schulz-Lell
G
G
Oldigs
H D
HD
Schaub
J
J
D000328:Adult; D000818:Animals; D005243:Feces; D006801:Humans; D007223:Infant; D007225:Infant Food / Q000032:analysis*; D008892:Milk / Q000032:analysis*; D008895:Milk, Human / Q000737:chemistry*; D012643:Selenium / Q000032:analysis* / Q000378:metabolism / Q000652:urine; D013054:Spectrophotometry, Atomic; D014131:Trace Elements / Q000032:analysis
D014131:Trace Elements; D012643:Selenium