NAFLD: non-alcoholic fatty liver disease, ALT: alanine transferase, NASH: non-alcoholic steatohepatitis, AST: aspartate transferase, HDL: high0density lipoprotein, TNF: tumor necrosis factor, BMI: body mass index, MDA: malondialdehyde, hs-CRP: high-sensitivity C-reactive protein, TBARS: thiobarbituric acid reactive substances, TAC: total antioxidant capacity, ALP: alanine phosphatase, HDL-C: high-density lipoprotein cholesterol, IL: interleukin, NAC: N-acetylcysteine. The gene discussed is TNF; the disease is metabolic dysfunction-associated steatohepatitis.