GPT and gallstones: Biochemically, participants with gallstones had elevated levels of alanine aminotransferase (ALT) (25.41 ± 19.51 U/L vs. 23.85 ± 21.30 U/L, p < 0.001) and aspartate aminotransferase (AST) (20.66 ± 9.86 U/L vs. 19.97 ± 11.18 U/L, p = 0.002).