The nutritional components of various foods are composed of protein, fat, sugar, inorganic salts (including trace elements), vitamins, dietary fiber and water. The ingested food is digested, absorbed and utilized in the body to generate heat energy, which constitutes a part of the body to meet the needs of growth and development and various physiological functions, and enhance the resistance to diseases and rehabilitation ability. In addition to genetic factors, a nation's physique also has a great relationship with the quality of nutrition. The growth and development of children are more closely related to the level of nutrition intake.
Nutrition is also closely related to children's intellectual development, immune function, sports ability or sports performance. There are enough heat energy, protein and vitamins in the diet, which can reduce fatigue, improve work efficiency and study efficiency, and enhance the resistance to diseases.
Malnutrition can cause anemia, low immunity, mental and physical retardation and a series of problems; However, overnutrition will make children too obese, which will also have a negative impact on health and growth. Therefore, it is necessary to arrange meals scientifically, develop good eating habits and obtain nutrition comprehensively and reasonably.