A variety of indices have been found for the early detection of NAFLD, such as the fatty liver index, NashTest, hepatic steatosis index, SteatoTest, OxNASH score, aspartate aminotransferase/alanine aminotransferase (AST/ALT) ratio, enhanced liver fibrosis panel (ELF), aspartate aminotransferase to platelet ratio (APRI) and fibrosis-4 score (FIB-4) [42,43,44,45,46]. This evidence concerns the gene GPT and fatty liver disease.