Taking fish-oil supplements for at least 10 years can shrink your risk of ductal carcinoma, the most common type of breast cancer, according to a study in Cancer Epidemiology, Biomarkers & Prevention. It’s thought that the omega-3 fats in fish oil reduce inflammation, which may contribute to breast cancer. But you can skip the supplement aisle, say the study’s researchers, and eat about 8 ounces of oily fish (salmon, sardines, tuna) a week. [Photo/IC]