Moreover, a breast cancer study demonstrated that tea polyphenols [catechin, epicatechin, and (−)-epigallocatechin-3-O-gallate (EGCG)] and bioflavonoids (quercetin, fisetin, and myricetin) inhibited DNMT1-mediated DNA methylation in a dose dependent manner. Here, DNMT1 is linked to breast cancer.