Lightly Sweetened Rica and Whole Wheat Flakes, Soy Granola with Honey, Cinnamon, and Vanilla Flavor. Soy Protein may reduce the risk of heart disease. Diets low in saturated fat and cholesterol that include 25 grams of soy protein a day may reduce the risk of heart disease. One serving of Kellogg's Smart Start Soy Protein provides 6.25 grams of soy protein.