The first is comprehensive balance, that is, eating everything, not picky eaters, not partial eclipse. As we all know, no single natural food can provide all the nutrients needed by the human body. Therefore, a reasonable diet must consist of a variety of foods in order to achieve a balanced diet.
Food can be divided into five categories according to its composition:
The first category is cereals and potatoes, which mainly provide carbohydrates, protein and B vitamins, and are the main sources of dietary energy in China.
The second category is animal foods, such as meat, poultry, eggs, fish and milk, which mainly provide protein, fat, minerals, vitamins A and B and essential fatty acids.
The third category is soybean and its products, which mainly provide protein, fat, cellulose, minerals and B vitamins.
The fourth category is vegetables and fruits, which mainly provide cellulose, minerals, vitamin C and carotene.
The fifth category is pure heat energy food, including animal and vegetable fats, various edible sugars and alcohol, which mainly provide heat energy and essential fatty acids.
Four benefits of a healthy and nutritious diet
① Regular exercise can enhance cardiopulmonary function, make the heart contract and rise, increase the heartbeat and reduce the number of heartbeats; Increase vital capacity, increase gas exchange between lung and tissue, and promote the discharge of carbon dioxide.
② It can reduce the cholesterol content in blood and increase the high lipoprotein cholesterol content in blood. This substance can remove fat and cholesterol deposited in blood vessels, thus preventing arteriosclerosis, coronary heart disease, hypertension and stroke, and delaying the aging of cardiovascular system.
③ It can improve the function of nervous system, enhance memory, improve the flexibility of body reaction, keep the elderly energetic, and improve their physiological self-care ability and work efficiency.
④ It can enhance human immune function, enhance the adaptability of the body to adverse environmental factors such as cold and high temperature, and improve the body's resistance to various diseases.