Specific introduction:
Carbohydrates are called carbohydrates, including monosaccharides, disaccharides and polysaccharides, among which monosaccharides include glucose, fructose and galactose. Disaccharides refer to sucrose, maltose and lactose. Polysaccharide is composed of thousands of monosaccharides, and the main component is polysaccharide. Carbohydrate is the main source of human energy, and fat is composed of fatty acids and glycerol.
Some fatty acids are very important for the normal operation of the brain, immune system and even reproductive system. The human body cannot synthesize them by itself and must take them from the diet. The fat in food mainly exists in meat, beans and nuts, and grains also contain a very small amount of fat. Protein includes plant protein and animal protein.
There are 20 kinds of amino acids in various protein, which are composed of different combinations and sequences. Vitamins in food participate in the metabolism of carbohydrates, fats and protein. Food is also rich in minerals, which participate in various physiological activities in the body and play a very important role in maintaining health.
Minerals include macro elements and trace elements, among which calcium, phosphorus, sodium and potassium are the most common macro elements, while iodine, zinc, iron and magnesium are the main trace elements. The cellulose and other substances contained in food are called dietary fiber. Dietary fiber can be divided into soluble and insoluble types, such as whole wheat flour, corn flour, apples and so on. Are all foods rich in dietary fiber.
Classification of food:
There are five kinds of food, cereals and potatoes, animal food, vegetables and fruits, bean products and pure energy food. Cereals and potato foods mainly include rice, noodles, sweet potatoes and sweet potatoes. Carbohydrate is its main content and a supplementary source of human energy.
Animal foods, including seafood, beef, pork, eggs and poultry, can provide rich protein, fat and minerals for human body.
Vegetables and fruits include apples, oranges, bananas and so on. Rich in vitamins and dietary fiber. Bean products include dried tofu, big tofu and so on. It is rich in protein and vitamins. Pure energy foods mainly include nuts and oils, which can provide more energy for human body.