The dietary habit of eating only vegetables for dinner and not eating is unscientific and can lead to malnutrition in the long run, because the maintenance of normal functions of the body’s organs and the normal functioning of the body can not be separated from the support of various types of well-balanced nutrients through the intake of nutrients. Although vegetables contain a variety of nutrients, vitamins and dietary fiber, can meet the body’s demand for vitamins and inorganic salts. But the normal functioning of the body’s organs need carbohydrates to participate, and carbohydrates need to be obtained through rice, steamed bread and other staple foods. Long-term do not eat staple food will lead to the human body due to insufficient carbohydrate intake, and thus the body will have a series of problems, such as causing immunity, resistance to reduce, increase the risk of cardiovascular and cerebrovascular diseases, diabetes, as well as fatty liver, anorexia. Long-term dinner only eat vegetables, not only will not lose weight, but also can lead to obesity, causing memory loss.