Whereas square meals and a well-rounded diet were once the shape of good nutrition, the food pyramid reflects nutrition for the 1990s. The U.S. Department of Agriculture has developed this new model that divides food into six groupings of varied sizes that stack into a pyramid. The pyramid supports the concept of a carbohydrate-based sports diet and offers the visual message that you should eat lots of breads, cereals, and grains for the foundation of your diet; generous amounts of fruits and vegetables; and lesser amounts of animal proteins and dairy foods. The tiny tip of the pyramid allows for just a sprinkling of sugars and fats.