While some of the foods that you eat can hurt you, there are foods that can actually help you, even to the extent of helping to preventing cancer. According to the National Cancer Institute estimates that roughly one-third of all cancer deaths may be diet related. Many of the foods that you eat daily contain cancer-fighting properties.Since there isn't one particular food that's going to do all the work, the best thing to do is to diversify your food selections. Oranges, grapes, and even different kinds of teas, have the ability to help prevent cancer. The following foods can even help inhibit cancer cell growth as well or help reduce the size of tumors