Use only natural oils and fats like olive oil, which is high in monounsaturated fatty acids. This may help reduce one’s risk of heart disease. Coconut oils are great for high heat cooking. Other acceptable oils are sesame oil, flaxseed oil, grape seed oil, peanut oil and walnut oil. All of these oils are high in omegas, which may promote a healthy heart. Heat and light spoil the oil. Over time, oils can degrade and lose some of their good nutritious qualities. Store your oil in a cool, dark place and replace it if it smells bitter or “off.” Some oils — particularly polyunsaturated oils such as grape seed or walnut oil — are quick to turn rancid. Store these oils in the refrigerator.