Fig. 1

The Effect of PCA on antioxidant indicators. Serum levels of indicators including T-AOC (a), TBARS (b), GSH-Px (c) and T-SOD (d) were determined by using respective kits. CTL, a basal diet; AUR, a basal diet containing 50 mg/kg aureomycin; PCA, a basal diet supplemented with 0.4% protocatechuic acid. Data were shown as means ± SD (n = 6), *P < 0.05 compared with CTL, ^#P < 0.05 compared with AUR