GPT and metabolic dysfunction-associated steatotic liver disease: In one study, CysA decreased both ALT and AST levels over a nine-day period of administration in patients with NAFLD [52]; it was reported that AST and ALT remained below baseline levels 24 weeks after withdrawal of the drug, suggesting that CysA inhibits fibrosis due to its reactive oxygen species scavenging effect and inhibition of transglutaminase activity [52].