PSMA6 and metabolic dysfunction-associated steatotic liver disease: Non-alcoholic fatty liver disease (NAFLD), now the most common liver disease in the world, is defined as the accumulation of fat in the liver beyond 5% of total liver weight in the absence of excessive alcohol use and other pathogenic sources such as viral hepatitis, Wilson disease, alpha-1-antitrypsin deficiency, autoimmune hepatitis, or other metabolic diseases1–4.