A healthy diet takes planning, and a food pyramid can be a helpful tool. The vegetarian pyramid outlines food groups and food choices that, if eaten in the right quantities, form the foundation of a healthy vegetarian diet. Indeed, a well-planned vegetarian diet can meet the needs of people of all ages, including children, teenagers, and pregnant or breast-feeding women. The key is to be aware of your nutritional needs so that you plan a diet that meets them. If you aren't sure how to create a vegetarian diet that's right for you, talk with your doctor and a registered dietitian. You may follow a vegetarian diet for cultural, religious or ethical reasons. Or you may eat a vegetarian diet to stay healthy and prevent health problems, such as cardiovascular disease.