Monounsaturated fats help protect your heart by lowering blood pressure, improving your cholesterol profile, and reducing your risk of cardiovascular disease — specifically when you use them to replace unhealthy fats. In other words, cook your food in olive or canola oil instead of butter, lard, or stick margarine There is also some evidence that substituting monounsaturated fats for refined carbohydrates in your diet can increase your HDL (good) cholesterol. For example, snack on nuts and seeds instead of cookies, pretzels, crackers, or candy. And you'll want to increase your consumption of monounsaturated fats if you are at risk for type 2 diabetes because they may lower peak blood-glucose response.
Some monounsaturated fats like olives and olive oil also contain polyphenols, antioxidants that protect the body from inflammation, which can ease arthritis pain and reduce the frequency, duration, and severity of migraine headaches.
The best food sources of monounsaturated fats are olive oil (and olives), canola oil, avocado, macadamia nuts, hazelnuts, pecans, almonds, peanuts, cashews, Brazil nuts, pistachio nuts, pine nuts, peanut butter (and other nut butters), sesame seeds (and tahini), pumpkin seeds, sunflower seeds.