There are seven categories of nutrients needed by the human body: minerals, lipids, proteins, vitamins, carbohydrates, water and dietary fiber.

The seven nutrients can play three physiological roles in the human body: first, as energy substances, supplying the energy needed by the human body (mainly proteins, carbohydrates and lipids); Building materials. Protein is mainly used to supply the energy needed by the human body. Thirdly, it is used as a regulating substance to regulate the physiological functions of the human body, mainly including vitamins, minerals and dietary fiber.

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The components of human tissue, accounting for about 16 to 19 in the normal human body, are enzymes, antibodies and certain The main component of hormones has biological functions such as catalysis, transportation, regulation, contraction, and immunity. It also plays an important role in memory, heredity, and detoxification.

Lipids are an important component of the human body, accounting for about 10-20% of the body weight; they provide fat-soluble vitamins and promote their absorption in the intestines, and are the highest heat source in the body. Dietary fat can improve food It has sensory properties, promotes appetite, increases satiety, body fat maintains body temperature, supports and protects organs, and has a thermal insulation effect.

Baidu Encyclopedia-Essential Nutrients for Human Body