Neuronal nitric oxide synthase (nNOS), endothelial nitric oxide synthase (eNOS), and inducible nitric oxide synthase (iNOS) mRNA (A) and protein (B) expression in hepatic tissues of the mice. Sample data in each group came from a normal distribution. The difference in variance between the two groups was significant (p < 0.05). a–f Mean values with different letters in the bar are significantly different (p < 0.05) according to Tukey’s honestly significant different test. Silymarin: Mice treated with silymarin (100 mg/kg), LP-HFY05-L: Mice treated with a low concentration of Lactobacillus plantarum HFY05 (1.0 × 108 CFU/kg), LP-HFY05-H: Mice treated with a high concentration of Lactobacillus plantarum HFY05 (1.0 × 109 CFU/kg), LDSB: Mice treated with Lactobacillus delbrueckii subsp. bulgaricus (1.0 × 109 CFU/kg).