We used the following search terms: “Non-alcoholic fatty liver disease” OR “NAFLD” OR “Metabolic dysfunction-associated steatotic liver disease” OR “MASLD” OR “metabolic dysfunction-associated fatty liver disease” OR “MAFLD” AND “glucagon-like peptide-1” OR “GLP-1” OR “Glucose-dependent insulinotropic polypeptide” OR “GIP” OR “glucagon” OR “GCG” OR “dual incretin agonism” OR “triple incretin agonism”. The gene discussed is GCG; the disease is fatty liver disease.