FASN and neoplasm: Similarly, the expression of FASN was higher in xenograft tumours of the HFD group than the LFD group (Figures 1e–g), whereas the mean serum FASN level was significantly lower in the HFD group than in the LFD group (3344.6±1005.8 and 6666.4±3685.8 pg/ml, respectively, P=0.026; Figure 1c).