Some of you may be old enough to recall the 1992 Food Pyramid, which had grains as the largest bottom block of the pyramid, encouraging you to eat 6-11 servings of bread, cereal, rice and pasta each day. This excess of carbohydrates, most of them refined, is precisely the opposite of what most people need to stay healthy. At the very top of the pyramid was fats and sugar, and while sugar clearly belongs there, healthy fats do not. In fact, most people would benefit from getting anywhere from 50 to 70 percent of their total calories from healthy fats!
via How Turning the Food Pyramid on Its Head Can Help You Slim Down.