There is evidence that the Portfolio diet can lower LDL cholesterol by about 11% in adults who have mild to moderately high LDL cholesterol levels. This way of eating focuses on adding specific plant-based foods daily including soy, plant sterols, soluble fibers, nuts, as well as dried beans, peas and legumes. Even if you’re not interested in eating all of these types of foods, adding in some of the groups on a regular basis can still help to lower your LDL cholesterol.