Moreover, natural compounds such as flavonoids [75,76], terpenoids [77], and chalcones [28,78] were found to modulate the function of ABCG2, whereas genistein [79], curcumin, and epigallocatechin gallate (EGCG) [80] were found to modulate the expression of ABCG2 in cancer cell lines. The gene discussed is ABCG2; the disease is cancer.