Nutrition and health news

(1) Food contains six kinds of nutrients, such as sugar, protein, fat and water, among which sugar such as starch is the main energy-supplying substance, and fat, as a standby energy source, is generally stored in subcutaneous fat.

Sugar mainly comes from the 1 layer cereal, and fat as backup energy mainly comes from oil.

(2) protein is closely related to the growth and development of human body and the repair and renewal of cells. The third and fourth floors mainly provide protein.

(3) Reasonable nutrition refers to the balance between various nutrients ingested from food and the human body's demand for these nutrients, neither lacking nor excessive. According to the pagoda of balanced diet, eat five kinds of food in a balanced way. Reasonable nutrition also includes reasonable dining system and reasonable cooking methods. You should eat three meals a day on time, and the ratio of breakfast, lunch and dinner is 3: 4: 3.

So the answer is: (1) ①; ⑤;

(2)③; ④; Protein;

(3)B