GPT and type 2 diabetes mellitus: Indeed, liver impairment, characterized by abnormally elevated serum levels of liver enzymes such as transaminases: alanine aminotransferase (ALT) and aspartate aminotransferase (AST); alkaline phosphatase (ALP) and γ-glutamyl-transferase (GGT) [11–13], is commonly observed in about 70% of diabetic patients and accounts for roughly 2–4% of fatalities in T2DM [14,15].