Serum phenylalanine in preterm newborns fed different diets of human milk, / Fenilalanina plasmática em recém-nascidos pré-termo alimentados com diferentes dietas de leite humano,

RESUMO

Objective: To evaluate phenylalanine plasma profile in preterm newborns fed different human milk diets. Methods: Twenty-four very-low weight preterm newborns were distributed randomly in three groups with different feeding types Group I banked human milk plus 5% commercial fortifier with bovine protein, Group II banked human milk plus evaporated fortifier derived from modified human milk, Group III banked human milk plus lyophilized fortifier derived from modified human milk. The newborns received the group diet when full diet was attained at 15 ± 2 days. Plasma amino acid analysis was performedon the first and last day of feeding. Comparison among groups was performed by statistical tests one way ANOVA with Tukey's post-test using SPSS software, version 20.0 (IBM Corp, NY, USA), considering a significance level of 5%. Results: Phenylalanine levels in the first and second analysis were, respectively, in Group I 11.9 ± 1.22 and 29.72 ± 0.73; in Group II 11.72 ± 1.04 and 13.44 ± 0.61; and in Group III 11.3 ± 1.18 and 15.42 ± 0.83 μmol/L. Conclusion: The observed results demonstrated that human milk with fortifiers derived from human milk acted as a good substratum for preterm infant feeding both in the evaporated or the lyophilized form, without significant increases in plasma phenylalanine levels in comparison to human milk with commercial fortifier. .