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. 2009 Feb 25;89(4):1068–1077. doi: 10.3945/ajcn.2008.27280

FIGURE 2.

FIGURE 2

Concentrations of phenylalanine in plasma of individual subjects with phenylketonuria (n = 11) after consuming the amino acid (AA) diet or the glycomacropeptide (GMP) diet for 4 d. Blood was obtained 2.5 h after eating breakfast, and plasma was isolated for analysis of the complete AA profile. Subjects showed a range of plasma phenylalanine concentrations after consuming the AA diet or the GMP diet for 4 d. There was no significant difference in the concentration of phenylalanine in plasma when the last day of the AA diet (day 4) was compared with the last day of the GMP diet (day 8); P = 0.173 by paired t test, pairing on subject. Group mean ± SEM was 619 ± 82 μmol/L (AA diet) and 676 ± 92 μmol/L (GMP diet). The mean change in the concentration of phenylalanine in plasma was 57 ± 52 μmol/L. phe, phenylalanine.