Fig. 4

Significantly different expression of lipid subclasses. Boxplot of six significantly different lipid subclasses, including Cer-NP, LPC, PC, TG, OxTG, and SHex. Except for Shex, the other five have higher average concentrations in the TN group. (Cer-NP ceramide non-hydroxyfatty acid-sphingosine, LPC lysophosphatidylcholine, PC phosphatidylcholine, TG triacylglycerol, OxTG oxidized triglyceride, SHex stigmasterol hexoside. *p < 0.05, **p < 0.01, ***p < 0.001, ****p < 0.0001).