GPT and metabolic dysfunction-associated steatotic liver disease: With regard to the levels of liver enzymes, there were significant differences between the lean and obese patients with NAFLD, with mean AST and ALT values of 28.1 ± 14.3, 31.9 ± 20.5 and 35.6 ± 20.3 (p = 0.003), 46.2 ± 27.7 (p = 0.003) kPa, respectively.