No food or diet can actually prevent breast cancer, but eating right can help keep the body as healthy as possible. Healthy foods boost the immune system and help maintain a healthy weight, lowering the risk of cancer. The following are 10 foods that can help fight and prevent breast cancer:
Almonds: They are great source of monounsaturated fats that help prevent breast cancer as well as other types of cancer.

Beans: Eating legumes twice a week can lower the rate of developing breast cancer.

Blueberries: They are great source of antioxidants, including cancer-fighting chlorogenic acid.

Broccoli: They are rich in sulforaphane, a plant chemical that interferes with the growth of breast cancer cells.

Flaxseed: Eating two tablespoons of ground flaxseed a day can slow the rate of cancer cell growth.

Garlic: Allyl sulfur and other substances in garlic slow the growth of tumor cells.

Green Tea: It is an excellent source of catechins, which are potent antioxidants. If green tea is sipped daily, the risk of developing breast cancer decreases.

Mushrooms: Portobello, cremini, button, and shiitake mushrooms contain ergothioneine and selenium, which are immune-boosting antioxidants that can decrease the risk of cancer.

Spinach: It contains the powerful antioxidants beta carotene and lutein. If eaten at least twice a week, the risk of breast cancer decreases.

Salmon and Seafood: If 1.5 to 3 ounces of fish or shellfish are consumed daily, the risk of developing breast cancer decreases by 26 percent.