Unsaturated fats are a type of fat that is typically liquid at room temperature. They are considered healthier than saturated fats because they can help lower bad cholesterol levels in the body. Unsaturated fats are mainly found in plant-based oils, nuts, seeds, and fatty fish like salmon and mackerel. There are two main types of unsaturated fats: monounsaturated and polyunsaturated. Monounsaturated fats, found in foods like olive oil and avocados, can improve heart health. Polyunsaturated fats, which include omega-3 and omega-6 fatty acids, are essential for the body and can be found in walnuts and flaxseeds.