The U.S. Department of Agriculture's 2005 Dietary Guidelines recommend that adults get 20%-35% of their calories from fats. At a minimum, we need at least 10% of our calories to come from fat.
The problem is that the typical American diet is higher in fat: Roughly 34% to 40% of our calories come from fat. Why? Because they taste so good and are widely available in our food supply. Fats enhance the flavors of foods and give our mouths that wonderful feel that is so satisfying.