Alcohol overdose: It's not just food you should be thinking about-that wine habit could also affect your breast health. Alcohol can triple the oestrogen levels in a woman's body. A lot of breast cancers are hormone-sensitive and having higher oestrogen levels could cause cancer cells to multiply. By minding oestrogen levels, you reduce your potential risk of oestrogen-related cancers. Cut down your alcohol intake and eat broccoli, cabbage, brussels sprouts and greens since they contain indoles that are believed to aid the body in reducing oestrogen levels and helping fight cancer.