Hepatic expression of Mir20b (A) and PPARα (B) and body weight (C), the ratio of fat mass to body weight (D), the ratio of lean mass to body weight (D), representative images and weight of liver (F), representative images of H&E staining and Oil Red O staining of liver slides (G), NAFLD activity score (NAS) (H), hepatic TG (I), serum AST (J), and serum ALT (K), glucose tolerance (L), insulin tolerance (M), fasting glucose (N), fasting insulin (O), and HOMA-IR (P) were analyzed in indicated mice. The gene discussed is PPARA; the disease is metabolic dysfunction-associated steatotic liver disease.