Food Pyramids: Nutrition Source, Harvard School of Public Health This simple illustration conveyed in a flash what the USDA said were the elements of a healthy diet. The Pyramid was taught in schools, ... Harvard School of Public Health's Healthy Eating Plate and Pyramid, based on the latest nutrition science, can point you to the healthiest foods. MyPlate, in contrast, fails to give some of the basic nutrition advice people need to choose a healthy diet. in Public bookmarkswith diethealthyby 2 users