Initial body weight (g)

270.5 ± 2.3^a

272.1 ± 2.3^a

273.5 ± 3.3^a

Final body weight (g)

422.4 ± 6.5^a

435.7 ± 7.9^a

429.4 ± 7.5^a

Food intake (g/day)

19.8 ± 0.7^a

21.2 ± 0.6^a

20.2 ± 0.7^a

Food efficiency

(gb.w. gain/g diet)

0.24 ± 0.01^a

0.24 ± 0.01^a

0.24 ± 0.01^a

Tissue weight (% b.w.) Liver

3.4 ± 0.1^a

3.5 ± 0.1^a

3.5 ± 0.1^a