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Table 2 Growth variables, faecal and urine nitrogen content in rats fed a diet containing casein, ESM-protein or ESM-hydrolysate

From: Eggshell membrane protein can be absorbed and utilised in the bodies of rats

 

Casein

ESM-protein

ESM-hydrolysate

Initial body weight (g)

277 ± 3

277 ± 3

277 ± 3

Final body weight (g)

305 ± 2a

286 ± 6b

296 ± 2ab

Body weight gain (g/day)

2.76 ± 0.22a

0.868 ± 0.468b

1.87 ± 2.4ab

Food consumption (g/day)

19.9 ± 0.0

20.0 ± 0.4

20.1 ± 0.7

Food efficiency*

0.136 ± 0.011a

0.0421 ± 0.0236b

0.0982 ± 0.0177ab

Faecal weight (dry g/5 days)

8.57 ± 0.08

9.90 ± 0.73

9.09 ± 0.40

Urine volume (mL/5 days)

62.8 ± 13.0a

26.3 ± 8.4b

61.1 ± 3.5a

Faecal nitrogen (mg/5 days)

40.8 ± 0.9a

226 ± 17b

101 ± 5c

Urine nitrogen (mg/5 days)

397 ± 12a

65.0 ± 10.6b

187 ± 12c

  1. Mean ± standard error (SE) of six rats. Superscript letters indicate a significant difference (Tukey’s test, p < 0.05)
  2. ESM egg shell membrane
  3. * Food efficiency: body weight gain (g/day)/food consumption (g/day)