Combination of green tea catechin with anticancer compounds such as curcumin, tamoxifen, raloxifene, resveratrol, y-tocotrienol and tricostatin enhance anticancer effects, including suppression of cell viability and colony formation, increase in catalase activity, synergistic cytotoxicity to the cells and G2/M-phase cell cycle arrest in human breast cancer cell lines (24–27). The gene discussed is CAT; the disease is breast cancer.