FASN and gastric cancer: All of the 3 selected serum metabolites (2,4-hexadienoic acid, 4-methylphenyl dodecanoate and glycerol tributanoate) were fatty acid, and high level of the these metabolites in GC patients might be related with the high level of fatty acid synthase regulated by sterol regulatory element-binding proteins (SREBPs) in the fatty acid pathway in GC [30, 31].