Fig. 3
Correlation of lipophilic metabolites differentially expressed between the TiO2 NPs treated and control group in liver, serum and feces of rats. A Correlation analysis of differential metabolites from different sources showed that there was a wide correlation between them. B The number of significantly related metabolites (p < 0.05) between each metabolite and other metabolites was counted, according to three sources. It showed that the three metabolites with the most significant correlation with other metabolites were phosphatidylcholines (PCs)