Whole Grain Wheat Cereal. Provides 13 vitamins and minerals. Post Bran Flakes is a great choice as part of a heart healthy diet. While the development of heart disease depends on many factors, diets low in saturated fat and cholesterol may reduce the risk of heart disease. Post Bran Flakes is 97% fat free and naturally cholesterol free. And, Post Bran Flakes is high in fiber. One serving has 5 grams of fiberthat's 20% of the recommended daily value, so your day is off to a great start. As you may know, diets low in fat and high in fiber-containing grains, fruits, and vegetables may reduce the risk of some types of cancer, a condition associated with many factors.