The most commonly used diet system for preschool children is three meals and two points system.

Brief introduction of diet system:

The diet system stipulates the time, frequency and calorie distribution of meals. Its reasonable formula can make various nutrients fully digested, absorbed and utilized, which is an important link to ensure reasonable nutrition. To formulate a dietary system, it is necessary to stipulate the number and interval of meals every day and distribute appropriate amounts of food. According to the gastric capacity of different ages, gastric emptying time and local eating habits at that time.

The concept of balanced diet:

Balanced diet means that the content of heat energy and various nutrients in the diet is sufficient, the variety is complete and the proportion is appropriate; There is a balance between the nutrition provided in the diet and the needs of the body. The structure of diet should be reasonable, not only to meet the physiological needs of the body, but also to avoid the imbalance of diet composition, unnecessary burden and short-term or long-term metabolic disorder caused by too many nutrients.

The human body needs more than 42 kinds of nutrients, including protein, fat, carbohydrates, vitamins, minerals, essential trace elements and water. A diet that can constitute more than 42 nutrients must be achieved through a variety of food sources.

Reasonable dietary system:

It is necessary to reasonably arrange three meals in a day, the interval between meals and the quantity and quality of each meal, so that the three meals can adapt to the daily life system and physiological conditions, and the process of eating, digestion and absorption can be coordinated. Reasonable arrangement of meal system is helpful to improve labor and work efficiency.

According to the living habits of China people, under normal circumstances, three meals a day are generally reasonable, with an interval of 4-6 hours. The distribution of meal times should be suitable for labor needs and physiological conditions, and the more suitable distribution is:

Breakfast accounts for 25% ~ 30% of total heat energy, lunch accounts for 40% of total heat energy, and dinner accounts for 30% ~ 35% of total heat energy. In addition, the meal time should be coordinated with the life and work system. Reasonable diet and scientific cooking methods can promote digestion and stimulate appetite. At the same time, it is necessary to ensure cleanliness, prevent food from being polluted and reduce the loss of nutrients.