GPT and ulcerative colitis: To investigate the effect of liver injury on colitis, the ulcerative colitis endoscopic index of severity (UCEIS) was analyzed in UC patients classified by the levels of alanine aminotransferase (ALT) and aspartate aminotransferase (AST) in the serum using retrospective chart review, and higher UCEIS scores were observed in liver injury‐suffering UC patients whose ALT or AST is greater than upper limit of normal (ULN) (Figure 1A; Figure S1A,B and Table S1, Supporting Information).