Translating nutrition advice into a colorful pyramid is great way to illustrate what foods make up a healthy diet. The shape immediately suggests that some foods are good and should be eaten often, and that others aren’t so good and should be eaten only occasionally. The layers represent major food groups that contribute to the total diet. The problem with the US government’s original Food Guide Pyramid, released in 1992, was that it conveyed the wrong dietary advice. And MyPyramid, its 2005 replacement, was vague and confusing.