1. Three nutrients in food, namely protein, lipids and carbohydrates, can provide energy to maintain body temperature and meet the energy needs of various physiological activities and physical activities.

2. Constitute body tissues and promote growth and development. Protein, lipids, carbohydrates and some minerals can be metabolized and assimilated to form body tissues to meet the needs of growth and metabolism.

3. Regulating the body's physiological activities Nutrients play a regulatory role in various physiological activities and biochemical changes of the body.

Extended data

Source of nutrition:

1. Foods containing more protein: Animal foods are rich in eggs (chicken, duck, goose, quail eggs), lean meat (pigs, sheep, cattle and poultry), milk (breast milk, sheep and milk), fish (fresh water and seawater) and shrimp (fresh water and seawater).

2. Foods containing more fat: animal oil, such as lard and cod liver oil; Vegetable oils, such as vegetable oil, peanut oil, soybean oil and sesame oil. Meat, eggs and soybeans also contain fat.

3. Foods containing more carbohydrates: cereals: rice, noodles and corn; Starch: sweet potato, sweet potato, potato, taro, mung bean and pea; Sugar: glucose, fructose, sucrose, maltose; There are also fruits and vegetables.

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