Most of us grew up learning the four food groups as a guide to a balanced, healthy diet. But that idea was replaced by the food guide pyramid. The lay-out is simple: foods to be eaten most often are at the bottom, or largest, part of the chart. And foods to be consumed in small quantities make up the tip of the pyramid. But not everyone follows the typical American diet, so nutrition scientists have drawn up a vegetarian variation of the pyramid. The Great Lakes Radio Consortium’s Wendy Nelson reports: