Fig. 2.
a Mean (±SEM) plasma phenylalanine, b leucine, c total branched chain amino acid (BCAA), d total essential amino acid (EAA), e total non-essential amino acid (NEAA), and f total amino acid (AA) concentrations following ingestion of 20 g of intrinsically l-[1-13C]phenylalanine-labeled protein plus 40 g of carbohydrate in healthy young (n = 12) and older (n = 12) men. a Significant time (P < 0.0001) effect. b Significant time (P < 0.0001) and time*group interaction (P = 0.0018) effect. c Significant time (P < 0.0001), group (P = 0.0050), and time*group interaction (P < 0.0001) effect. d Significant time (P < 0.0001) and time*group interaction (P = 0.0032) effect. e Significant time (P < 0.0001) and group (P = 0.0032) effect. f Significant time (P < 0.0001) and group (P = 0.0005) effect. * = P < 0.05 compared to corresponding time point in the Young group