The effect of TA on the content of anti-oxidative enzymes in serum. GSH-Px (10), CAT (11), and SOD (12) level in the serum of male Lasiopodomys brandtii provided low dose (3 mg/mL) and high dose (6 mg/mL) tannic acid (TA). Error bars indicate standard error. Same letters connect bars with no significant differences at p < 0.05 (n = 6).