Similar to the effects of quercetin in Calu‐3‐ALIs and PBECs, a mixture containing quercetin downregulated TMPRSS2 and other androgen‐responsive genes in prostate cancer cells,57 and quercetin acts as an antagonist of estrogen receptor‐mediated activities in HeLa cells.58 Here, TMPRSS2 is linked to prostate carcinoma.