The core concept of nutrition

The core concept of nutrition is to transform the "balanced diet pagoda" into the approximate proportion of various foods according to the principle of balanced diet, and express it in the form of an intuitive pagoda. The food demand at the bottom of the "balanced diet pagoda" is more, and the demand is less when it goes up, and the demand at the top is the least. The bottom layer is grain, which mainly provides energy; The second layer mainly provides vitamins for fruits and vegetables; The third layer is animal food, and the fourth layer is dairy products and bean products, which mainly provide protein and calcium; The top layer is oil, which mainly provides fat. Therefore, there is one food that should be eaten less, and that is oil.

(1) The staple food people eat every day is cereal, which contains more starch. Starch is digested into glucose in human body, and sugar is the main energy-supplying substance, which can provide energy for human body. Therefore, if this kind of food is not matched in diet, it will lead to the lack of energy-supplying substances such as sugar in the body.

(2) The food on the third and fourth floors is rich in protein, and protein is an important substance that constitutes cells, which is of great significance to the growth and development of human body and the repair and renewal of cells. Therefore, adolescents in the developmental stage should eat more foods of protein and calcium.

(3) Reasonable nutrition refers to the complete variety, sufficient quantity and proper proportion of nutrients contained in the diet; Keep a balance with the needs of the body. A balanced diet is the core of reasonable nutrition. A healthy diet should be reasonable and balanced, with diversified foods, reasonable combination of meat and vegetables and comprehensive and reasonable nutrition. So the recipe designed by this classmate is reasonable. (1) cereals; Providing energy (2) protein (3) is reasonable; The food should be diversified, the combination of meat and vegetables should be reasonable, and the nutrition should be comprehensive and reasonable, so the recipe designed by this classmate is reasonable.