The GoodStudies show that good fats, including polyunsaturated (in fish, walnuts and canola oil) and monounsaturated fats (in olive oil, peanut oil, almonds and avocadoes), help lower cholesterol levels and prevent a variety of chronic diseases ranging from cancer to stroke. ???Good fats actually lower your risk of heart disease by reducing the LDL (bad) cholesterol levels in the blood,??? says An