Protein is a very important component of the human body, protein, fat and sugar constitute the cornerstone of the three major nutrient metabolism of the human body, protein deficiency will have very serious hazards and symptoms: 1, because protein is a nutritional element, it will play a great influence on the synthesis of the body, when protein loss, especially children, will interfere with the growth and development of children, growth retardation, height 2, because protein contains amino acids, can be formed into the body of some of the necessary nutrients, when protein deficiency, will find that the hair becomes dry, yellow, easy to break, nails are also prone to delamination and fracture, so this all suggests the emergence of nutritional stunted growth; 3, because of the lack of protein, but also can not ensure that the body’s energy is sufficient, easy to cause fatigue The state of fatigue. Because protein constitutes a necessary component for the development of body cells and is also the main component of enzymes, hormones and antibodies, when protein is lacking, there will be a weakening of blood vessel elasticity, relaxation of blood vessel walls, and slow blood flow, so there will be dizziness, weakness, slowed synthesis, and a serious decline in the nutritional status of the skin. These are some of the clinical manifestations that often occur when protein deficiency is present.