Other lipid classes such as phosphatidylcholines (PC), lysophosphatiylcholines, phosphatidylinositols (p < 0.05), lysophosphatidylinositols, phosphatidylethanolamines (PE), lysophosphatidylethanolamines (LPE), or sphingomyelin (SM; p < 0.01) were increased in the serum of NAFLD patients with high circulating leptin levels (Figure 2). Here, LEP is linked to metabolic dysfunction-associated steatotic liver disease.