GPT and fatty liver disease: Scores based on blood biomarkers available to diagnose or grade steatosis include the Hepatic Steatosis Index (HSI), and to stage fibrosis include NAFLD Fibrosis Score (NFS) and BARD, which are more specific of NAFLD, and Aspartate Transaminase (AST)/Alanine Transaminase (ALT) Ratio and Fibrosis-4 Index (FIB-4), which have been developed in the context of hepatitis C [12].