PPARG and metabolic dysfunction-associated steatotic liver disease: Finally, in vitro experiments verified that the Renshen and Chaihu herb pair had a pharmacodynamic effect on the components of stigmasterol by activating the PPARγ signalling pathway, clarified the material basis of the Renshen and Chaihu herb pair for the treatment of NAFLD, and provided an experimental basis for the treatment of NAFLD.