“Nature’s Medicines,” published by Rodale Books, says that soy foods help enlarged prostates. Soy products, such as roasted soy nuts, soy milk, soybeans and tofu, contain phytosterols. The Oregon State University Linus Pauling Institute Micronutrient Information Center says phytosterols are plant-based compounds similar to cholesterol that keep cholesterols from absorbing in the intestines. A traditional Western diet is low in this vital nutrient; however, research indicates that a diet rich in phytosterols decreases a man’s risk of enlarged prostates.