Interestingly, M. oralis showed significant positive correlations with multiple liver pathology-associated blood parameters (Fig. 6A), including aspartate aminotransferase (AST), alanine aminotransferase (ALT) (both parameters known to increase in liver damage [21]), and GGT (a parameter known to increase in metabolic syndrome-associated liver pathologies [21–23]). Here, GPT is linked to metabolic syndrome.