Sarcopenia-related gut microbial changes are associated with the risk of complications in people with cirrhosis

•The composition and biosynthetic functions of gut microbiota are significantly changed in those with sarcopenia and cirrhosis.•Individuals with cirrhosis and sarcopenia-related depletion of fecal Ruminococcus 2 and Anaerostipes had more complications.•Modifying gut microbiota may improve the clinical outcomes of individuals with cirrhosis and sarcopenia.