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Table 4 Nitrogen excretion and nitrogen balance per protein diet

From: No protein intake compensation for insufficient indispensable amino acid intake with a low-protein diet for 12 days

  Whey protein (n = 39) Soy protein (n = 40) Beef protein (n = 58)
N excretion day 11 (mg.kgBW.d -1 )    
5En% (5En% wheat) 71.2 ± 30.6a 70.8 ± 22.8a 67.9 ± 21.6a
15En% (5En% wheat + 10En%) 124.8 ± 59.0b 112.2 ± 47.9b 138.0 ± 56.8b
30En% (5En% wheat + 25En%) 203.0 ± 104.6c 191.0 ± 79.9c 217.4 ± 109.7c
N balance day 11 (mg.kgBW.d -1 )    
5En% (5En% wheat) 4.2 ± 39.1a -6.9 ± 28.3a 3.5 ± 27.6a
15En% (5En% wheat + 10En%) 47.6 ± 52.1b 48.5 ± 43.5b 50.1 ± 60.4b
30En% (5En% wheat + 25En%) 73.5 ± 69.6c 71.5 ± 53.9c 95.8 ± 110.1c
  1. Values shown as means ± SDs.
  2. Values with different superscript letters indicate significant differences between diets that differed in relative protein content, P < 0.05 (in the whey, in the soy, or in the beef protein diets, repeated-measures ANOVA with Bonferroni correction for pairwise post-hoc comparisons).
  3. There were no significant differences between the protein groups (Non-parametric tests).
  4. BW, body weight; En%, percentage of energy; N, nitrogen P, protein.