Table 2.
Food and ME Zn intake and final body weights of male weanling rats fed high-fat diets differing in Zn content and fat source free choice or in restricted amounts for 4 wk.
| Diet groups1,2 | 2 × 2 ANOVA3: P level | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| LZ-CB | HZ-CBR | LZ-SF | HZ-SFR | HZ-SF | Zn | Fat | Zn × fat | ||
| Food intake | g DM/d | 13.2b ± 0.9 | 12.9b ± 0.4 | 9.4a ± 1.0 | 9.4a ± 0.2 | 14.5c ± 0.4 | 0.70 | <0.001 | 0.44 |
| ME intake | kJ/d | 199b ± 14.1 | 195b ± 6.5 | 159a ± 16.9 | 160a ± 2.3 | 245c ± 7.3 | 0.73 | <0.001 | 0.45 |
| ME intake | kJ/g BWG | 36.3a ± 1.8 | 35.6a ± 1.7 | 39.4b ± 2.1 | 36.1a ± 1.6 | 36.7a ± 1.1 | 0.005 | <0.001 | 0.052 |
| Zn intake4 | μg/g BWG | 18.7a ± 0.9 | 124.9c ± 6.1 | 18.2a ± 1.0 | 113.2b ± 4.9 | 115.2b ± 3.6 | <0.001 | 0.001 | 0.062 |
| Final body weights | g | 205b ± 14.8 | 205b ± 11.5 | 164a ± 18.2 | 175a ± 9.9 | 238c ± 13.7 | 0.31 | <0.001 | 0.21 |
1LZ-CB, low-Zn (7.8 μg Zn/g DM) cocoa butter (CB) diet fed free choice; HZ-CBR, high-Zn (53 μg Zn/g DM) CB diet fed in restricted amounts equivalent to the intake of the LZ-CB diet; LZ-SF, low-Zn (7.8 μg Zn/g DM) safflower oil (SF) diet fed free choice; HZ-SFR, high-Zn (53 μg Zn/g DM) SF diet fed in restricted amounts equivalent to the intake of the LZ-SF diet; HZ-SF, HZ-SF diet fed free choice.
2Values are means ± SD, n = 8. Labeled means in a row without a common letter differ by 1-factor ANOVA followed by Tukey's multiple-comparison test, P < 0.05.
3Bifactorial ANOVA of the LZ-CB, HZ-CBR, LZ-SF, and HZ-SFR diet groups.
41-factor and bifactorial ANOVA after logarithmic transformation of the data.
BWG, body weight gain; DM, dry matter; ME, metabolizable energy.