Nutrition literally means "seeking", "nourishing" means "preserving health" and "nutrition" means "seeking for preserving health". Health preservation is a term used in traditional medicine in China, which means to maintain, regulate and support life. To describe "nutrition" in modern scientific language, it can be said that nutrition refers to the intake, digestion, absorption, metabolism and excretion of food.
The process of using nutrients and other beneficial ingredients in food to construct tissues and organs, regulate various physiological functions, maintain normal growth and development, prevent diseases and protect health. Definition of nutrition: Biotin, which can be obtained from food and is necessary for the body, is called nutrition. The human body's demand for nutrition is different in different periods.
In the era of poverty, protein, fat and sugar are the best nutrients that the human body lacks most. In modern times, protein, fat and sugar seriously exceed the standard in human body. What the human body lacks most now are vitamins, minerals and cellulose. The whole process of food intake and utilization by animals or plants, in animals, usually includes intake, digestion, absorption and assimilation.
Qu Qiubai's "Hungry Country Tour" II: "There are beautiful scenery in the south of the Yangtze River, Songjiang perch and Xixiang leek, which are nutritious for me." Chapter 10 of Liu Qing's Entrepreneurial History: "The middle-aged woman stubbornly refuses to show her rosy face to her man."