Well you see there is no one food that can prevent breast cancer but eating healthy can reduce your risk overall,if you eat foods that are rich in antioxidants you are protecting your cells from free radicals,you see the best part here is that there is no downside to changing your diet to a healthy one,plus eating healthy can give you more energy and also boost your immune system too and if you have a great immune system your body can fight all kinds of health issues,and changing your diet is one of the most important thing you can do to help to prevent breast cancer too,ok here are some foods like berries such as blueberries and strawberries and black raspberries you see these have very high amounts of polyphenols,and this has anticancer properties too,plus there is evidence that berries just may help to reduce breast cancer risk and the best part is you don't have to eat the whole bag just 1cup per day or do like i do mix the berries in your smoothie very powerful and healthy and very easy.