GGTLC1 and primary biliary cholangitis: Serum liver enzyme (alanine transaminase (ALT), aspartate transaminase (AST), alkaline phosphatase (ALP), and gamma-glutamyl transpeptidase (GGT)) levels, bilirubin (total bilirubin (TBIL) and direct bilirubin (DBIL)) levels, and total bile acid (TBA) levels were significantly higher in both non-cirrhotic and cirrhotic PBC patients than in healthy controls.