When NAFLD patients is divided according to liver histology (pure fatty liver vs. NASH), serum resistin levels are higher in patients with NASH than in those with pure fatty liver and positively correlated with the NASH score, an index that takes into account necrosis, inflammation, and fibrosis in liver biopsies and reflects the severity of the disease. Here, RETN is linked to metabolic dysfunction-associated steatotic liver disease.