Fish could be the most important foods in the prevention of breast cancer. It has been found that fish oils are very beneficial in keeping breast cancer away in women who have crossed their menopause. Fish oils are effective even with risk factors such as age during the first full term pregnancy, age at first menses, age at menopause, other breast disorders, etc. Moreover, a diet that contains of a combination of fish and carrots is found to be much more highly effective than fish alone. Fish contain the omega-3-polyunsaturated fatty acids which are good combatants of breast cancer, as they reduce the levels of the harmful omega-6 fatty acids, which in fact promote the growth of the cancerous tissues.