Protein is the foundation of all life, which is constantly synthesized and decomposed in the body. It is an important part of constructing, renewing and repairing tissues and cells. It participates in regulating substance metabolism and physiological functions, and ensures the growth, development, reproduction, heredity and energy supply of the body. Meat, eggs, milk, fish and beans are the main nutrients in protein.
(2) Fat
Fat is one of the energy sources, which assists the absorption of fat-soluble vitamins (A, D, E, K and carotene), protects and fixes internal organs, prevents heat from disappearing and keeps body temperature. Grease is the main nutrient to provide fat.
(3), vitamins
Vitamins are essential substances to maintain human health, and the required amount is small, but they must be taken from food because they cannot be synthesized in the body or the synthetic amount is insufficient. Vitamins are water-soluble (vitamin B, vitamin C) and fat-soluble (vitamins A, D, E, K, etc. They are very important for the normal growth and development of human body and the regulation of physiological functions. Vegetables and fruits are the main nutrients that provide vitamins.
(4) sugar
Sugar is the main energy substance of human body, and more than 70% of the energy needed by human body is provided by sugar. It is also an important part of tissues and cells. Cereals are the main nutrients that provide sugar.
(5) minerals
Minerals are important components of bones, teeth and other tissues, which can activate hormones and maintain the main hormone system, and have a very important role in regulating physiological functions. Vegetables and fruits are the main nutrients that provide minerals.
(6) water
Water is the main component of body fluids in human body, and it is necessary to maintain life, accounting for about 60% of body weight. It has the functions of regulating body temperature, transporting substances, promoting chemical reactions in the body and lubricating. The source of water is mainly the water we need to maintain our body every day.
(7) Dietary fiber
Dietary fiber refers to the components in plants that cannot be digested and absorbed, and is an indispensable factor to maintain health. It can soften intestinal substances, stimulate gastric wall peristalsis and assist defecation. And reduce the absorption of cholesterol and glucose in the blood.
Sub-health deficiency