Inadequate intake of carbohydrates may produce symptoms such as lethargy, having hunger pangs and dizziness. Carbohydrates are the basic substances needed by the body and the main source of energy, as well as the main source of blood sugar. If the intake of carbohydrates is insufficient for a long period of time, the body’s energy supply will be insufficient, which will easily lead to symptoms of fatigue and tiredness. Generally, the carbohydrate content of staple food is more, long time not eat staple food and other carbohydrates easy to make the body can not reach the sense of satiety, it is easier to appear hungry. In addition, insufficient carbohydrate intake is also likely to affect the body’s blood glucose level, when hypoglycemia occurs, may be manifested as pale, panic, dizziness, inattention, slow reaction and other symptoms. It is recommended to have a moderate daily intake of carbohydrate-containing foods, such as rice, cereals, bread and other staple foods, or root vegetables such as potatoes and sweet potatoes, in order to maintain the energy and nutrients needed by the body.