INS and metabolic dysfunction-associated steatotic liver disease: Intriguingly, at the end of the trial, all features of NAFLD and metabolic abnormalities observed in HFD+B29 mice, including degenerated hepatocytes, increased NAFLD activity score, body weight, fat pad mass, and blood lipid, glucose, and insulin levels, were not observed in mice upon colonization with the waaG mutant strain (HFD+mutant) (Fig. 1 and Fig. S2).