FAS and metabolic dysfunction-associated steatotic liver disease: It’s possible mechanism is that TFSC downregulating the mRNA expression of transcription factor SREBP-lc to regulate the downstream lipid synthesis related genes ACC, FAS and LEP expression, meanwhile, TFSC upregulated the level of transcription factor PPAR-α to regulate the downstream lipidolysis related genes CPT-1 and CYP7A1 expression, and improved the liver tissue β oxidation and in vivo fatty acid degradation, inhibit fatty acid synthesis, and finally reach the effective regulation of lipid metabolisms of experimental rat model of NAFLD (Table 4).