STAT3 and neoplasm: Quercetin is a flavonoid compound that affects the cell cycle, growth, metastasis, and proliferation of colon, breast, and prostate tumors through various pathways such as p53/miR‐34a/SIRT1, PI3K/AKT/mTOR, IL‐6/STAT3, and Notch/AKT/mTOR and suppresses tumor cells (Lou et al., 2015; Michaud‐Levesque et al., 2012).