For shedding some pounds, it does not matter whether what kind of diet you follow, but if you want to improve your cholesterol levels, you must follow a high fat and walnut-rich diet. The data conducted from six-month study effectively proves that a diet which is high in fats, low in carbohydrates, rich in walnuts and the polyunsaturated fatty acids had a good impact on body’s lipid levels. It lowered the levels of low-density lipoproteins which are bad cholesterols and increased the levels of high-density lipoproteins (HDL), good cholesterols. Hence, it will only be healthier to add Walnuts in your regular diet.