Seven nutrients can play three physiological roles in the human body: one is as energy materials to supply the energy needed by the human body (mainly protein, carbohydrates and lipids), and the other is as building materials for the human body. Protein is the main energy supply to the human body, and the third is as a regulating substance to regulate the physiological functions of the human body, mainly including vitamins, minerals and dietary fiber.
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Human tissue components account for about 16%~ 19% in normal people. They are the main components of enzymes, antibodies and some hormones, which have biological functions such as catalysis, transport, regulation, contraction and immunity, and also play an important role in memory, heredity and detoxification.
Lipid is an important part of human body, accounting for about10% ~ 20% of body weight; It provides fat-soluble vitamins and promotes their absorption in the intestine, which is the highest heat source in the body. Dietary fat can improve the sensory characteristics of food, promote appetite, increase satiety, maintain body temperature, support and protect organs, and have the function of heat insulation.
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