1, sugar (carbohydrates)

Carbohydrates are the body's most important source of calories, involved in many life activities, is the cell membrane and quite a few components of the organization; to maintain normal nerve function; to promote the metabolic effects of fat and protein in the body.

2, grease

Grease is a collective term for oil and fat. Fat is an important component of human tissue cells, it is absorbed by the body to supply calories, is the same amount of protein or carbohydrates for energy 2 times;

Fat is also an important form of energy supply in the body's storage. Fat is also conducive to the absorption of fat-soluble vitamins;

Maintain the normal physiological function of the human body; body fat can be insulated to reduce heat loss, support, protection of a variety of organs in the body, as well as joints, etc. from damage.

3, protein

If the human body as a building, then protein is the composition of the building materials. Important components of the human body: blood, muscles, nerves, skin, hair, etc. are composed of protein;

Protein is also involved in the renewal and repair of tissues; regulate the body's physiological activities, enhance resistance; protein is also energy-producing, providing energy for children's growth and development, so it is also energy-producing nutrients.

4, vitamins

Vitamins are a class of compounds necessary to maintain normal physiological function of the human body, they do not provide energy, and is not a component of the body's structure, but the diet is absolutely indispensable, such as a certain kind of vitamin deficiency or insufficient for a long period of time, you can cause metabolic disorders, as well as the emergence of pathological conditions and the formation of vitamin deficiency.

5, water

Water is an important condition for the survival of humans and animals (including all living things). Water can be transported essential substances and exclude the body of unwanted metabolic products;

Promote all chemical reactions in the body; through the unconscious evaporation of water and sweat secretion exudes a large amount of heat to regulate body temperature;

The synovial joints, respiratory and gastrointestinal mucus have a good lubricating effect, tears can prevent eye dryness, saliva is conducive to pharyngeal moistening and swallowing of food.

Saliva is good for moisturizing the throat and swallowing food.

6, inorganic salts

Inorganic salts that is, inorganic compounds in the salts, the old name of the minerals, in biological cells generally account for only 1 ~ 1.5% of the fresh weight.

More than 20 kinds have been found in the human body, among which the macronutrients are calcium Ca, phosphorus P, potassium K, sulfur S, sodium Na, chlorine Cl, magnesium Mg (also known as the massive elements), and the trace elements are iron Fe, zinc Zn, selenium Se, molybdenum Mo, fluorine F, chromium Cr, cobalt Co, and iodine I, and so on.

While inorganic salts in the cells, the human body is very low, but the role is very large, if you pay attention to dietary diversity, eat less animal fat, eat more brown rice, corn and other coarse grains, do not consume too much refined flour, can make the body's inorganic salts to maintain a normal due level.

7, dietary fiber is known as the "seventh major nutrient" is the body needs six nutrients, the first three in the body after metabolism to produce energy, so it is also known as energy production nutrients.

Source:Baidu Encyclopedia - Nutrients