With the different signaling pathways of resveratrol in cancers, resveratrol inhibits multiple intracellular mechanisms, such as β-catenin signaling, transforming growth factor (TGF)-β signaling, PI3K/Akt signaling, and Src/signal transducer and activator of transcription 3 (STAT3) signaling [57]. Here, STAT3 is linked to cancer.