Not eating vegetables will lead to a lack of many essential nutrients, including a variety of vitamins, folic acid, in addition to a lack of dietary fiber and other very important biological elements for the human body, so we must pay attention to a balanced diet, not completely without vegetables. But if you only eat vegetables and not meat, it will also lead to a lack of animal protein and other nutrients, especially in the growing teenage children must not be picky eaters. Because the growth and development of people need a balance of a variety of nutrients to work together, the lack of any one nutrient may lead to poor growth and development, or even cause disease. So be sure to vegetables, fruits and carbohydrate staples, as well as animal protein from meat should go to the appropriate intake.