The knowledge of nutrition, I believe that everyone rarely comes into contact with nutrition. In fact, nutrition is a subject that studies the relationship between human metabolism and food nutrients. Let me tell you something about nutrition. I hope you like it.
Nutrition knowledge 1 By describing the history, origin, development, characteristics and level of nutrition, we can know the development of nutrition. Nutrition has a far-reaching impact on society, family, industry, health and policy. The United States is the representative of molecular nutrition, China is the representative of holistic nutrition, and the Japanese have their own characteristics.
The origin of modern nutrition began with the discovery of carbohydrates in 1900, and gradually became a professional discipline. China had the concept of nutrition for a long time. For example, the raw materials and cooking methods in jiaozi, China, are in line with the China food culture with color, fragrance and taste while ensuring that all kinds of nutrients are complete and not lost. This shows that China culture is profound.
Teaching content of food nutrition
Including the chemical composition and nutritional characteristics of various foods; The characteristics of common foods in each kind of food (including nutrients and food taste, etc. ); The effects of food processing, cooking and storage on food nutrients, etc.
Finally, the concept and basic conditions of balanced diet are expounded from the perspectives of modern nutrition and traditional Chinese medicine nutrition, and three theoretical and technical tools for realizing balanced diet are introduced, namely, Dietary Guide for China Residents, Balanced Dietary Pagoda for China Residents and Reference Intake of Dietary Nutrients for China Residents, so as to guide how to realize reasonable nutrition.
Nutrition knowledge. The role of nutrition:
Ensure that the body can obtain substances that can generate enough energy; Materials needed to construct and repair tissues and organs; Material supply for normal function of human body.
Nutrition and calories
Basic nutrients (carbohydrate, fat, protein) can produce energy. The calculation unit is "kilocalories" (1 kg purified water 1 degree Celsius), 1 g protein or 1 g carbohydrate generates 4 kilocalories, 1 g fat generates 9 kilocalories, and other substances do not generate heat. The main substance that can repair muscles is protein.
Water is an indispensable nutrient for human body. Water accounts for 40%-60% of the total body weight, 72% in muscle and only 20%-25% in fat. An inactive adult needs about 2.5 liters, which can be increased by 5-6 times in sports and hot seasons.
There are 22 kinds of metal elements in human body, accounting for about 4% of body weight, which are called minerals or inorganic salts. Minerals play an important role in regulating the metabolic function of human body, and also play an important role in the synthesis of glycogen, fat and protein.
Vitamins are neither energy-supplying substances nor constituent substances of body tissues, but they are indispensable organic substances for maintaining normal functions of human bodies. Eating more vitamins E, C and B helps athletes to eliminate fatigue.