at 6.4 to 5.7 % dietary protein calories stool wet weights were twice as high , apparent n absorption significantly lower ( 65.6 +/- 5.9 versus 87.5 +/- 2.3 % of intake ) , and apparent n retention much lower ( 9.8 +/- 6.1 versus 34.5 +/- 10.2 % of intake ) than during preceding and following isocaloric and isonitrogenous casein-based diets .
C0012177
dietary protein
C0007332
casein