Time Course of Postprandial Protein Metabolism

The macronutrient composition and energy of the milk protein beverage provided to participants is 38 g protein (3.46 g leucine), 4.17 g carbohydrate, and 1.4 g fat. The milk protein met all chemical and bacteriologic specifications for human consumption. The L-\[1-13C\]phenylalanine and L-\[1-13C\]leucine enrichments in the milk protein concentrate averaged 38.3 and 10.8 mole percent excess (MPE), respectively.