What we eat and how we treat our bodies on a daily basis have a very powerful effect on our health and quality of life. Although cancer can affect many different parts of the body, the foods that prevent cancer and deter cancer growth are generally the same. Fruits, vegetables, grains, and legumes all have important nutrients and other cancer-fighting substances like phytochemicals and pectin that strengthen immune function and destroy cancer-causing substances before they cause harm. Research has shown that people who eat a diet free of animal products, high in plant foods, and low in fat have a much lower risk of developing cancer.