Yes, certain nutrients have been linked to a reduced risk of cancer. For example, fiber found in whole grains, fruits, and vegetables can aid in reducing the risk of colorectal cancer. Omega-3 fatty acids, commonly found in fatty fish, flaxseeds, and walnuts, may lower the risk of breast and prostate cancers. Folate, a B-vitamin found in leafy greens, beans, and fortified cereals, has been shown to reduce the risk of pancreatic cancer.