Unsaturated fats are liquid at room temperature. They are considered useful fats because they can improve blood cholesterol levels, and ease heart rhythms. Most vegetable oils are liquid at room temperature have unsaturated fats. There are two kinds of unsaturated fats, Mono-unsaturated fats, and polyunsaturated fats. It is commonly found in avocados, nuts, peanuts, seeds, wild fish, and olive oil. For polyunsaturated fats, it is recommended to have a omega-3 to omega-6 ratio of 1:1.