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  • Title: A method for assessing carbohydrate energy absorption and its application to premature infants.
    Author: Kien CL, Sumners JE, Stetina JS, Heimler R, Grausz JP.
    Journal: Am J Clin Nutr; 1982 Nov; 36(5):910-6. PubMed ID: 7137075.
    Abstract:
    A method was developed for assessing indirectly the fecal excretion of carbohydrate-derived energy. Then, eight healthy premature infants (28 to 32 wk gestation, postnatal age 12 to 30 days) were randomly assigned to receive one of two formulas that differed only in the carbohydrate source: 100% lactose or 50% lactose: 50% glucose polymer (lactose + glucose polymer). Excreta collections were analyzed for total nitrogen, urea nitrogen, ammonia, fat, and total energy. Carbohydrate energy absorption was calculated. The formulas were well tolerated and stool frequency, energy intake, weight gain, and nitrogen balance were not different in the two formula groups. Also, there were no significant intergroup (lactose versus lactose + glucose polymer) differences in the coefficients (%) (x +/- SD) of fat absorption (90 +/- 6 versus 93 +/- 5) or carbohydrate energy absorption (96 +/- 1 versus 95 +/- 3). Thus, net carbohydrate-energy absorption appeared normal in these premature infants who showed no clinical formula intolerance.
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