Figure 5. Fecal microbiota transplantation (FMT) findings. (A) Histopathological examination of liver tissue in GF mice colonized with gut microbiota from healthy controls or NHS patients (Oil Red O staining). (B) L-tryptophan and kynurenine quantification by UPLC-MS/MS. Data are mean ± SE; h: control group; z: NHS group; *P < 0.05.