Table 4. Effects of vitamin A supplementation on liver catalase, SOD, GSH-Px, GR, and GST activities in rats fed the experimental diets (unit/min/mg protein).

The experimental groups are described in Table 1.

Values represent the mean ± SD.

Values with different superscript letters within a column are significantly different (P < 0.05).

NS: Not significant; SOD: Superoxide dismutase; GSH-Px: Glutathione peroxidase; GR: Glutathione reductase; GST: Glutathione-S-transferase