Fast food originated in the United States in the early 1900s when the first automat and hamburger chain opened. Fast food is mass-produced food that is prepared and served quickly from restaurants, cafes, or take-out locations. Common fast food items include hamburgers, cheeseburgers, sandwiches, milkshakes, and tacos. People eat fast food primarily because it is inexpensive, convenient, and tastes good. While fast food provides affordable access to calories, it is also high in saturated fat and may negatively impact fitness levels if eaten regularly.