1, protein. The basic substance that constitutes human cells provides energy for human physiological activities; The growth and development of human body and the repair and renewal of damaged cells are inseparable from protein. Fish, eggs, milk, meat and soybeans contain more protein.
2. sugar. The most important energy-supplying substance in human body is also a component of cells; Glucose, sucrose and starch are all sugars. Sweet potato, potato, rice and flour have higher sugar content.
3. Fat. Generally speaking, fat is stored in the body as a spare energy substance; Fat meat, soybeans and peanuts contain a lot of fat.
4, vitamins. It does not participate in the formation of human cells, nor provides energy, and its content is small, which plays a regulatory role in human life activities.
5. Inorganic salts. Also known as minerals, it is very important for our health. Fruits, vegetables and grains all contain important inorganic salts.
6. water. It is the most abundant in human body, accounting for about 60%-70% of body weight. Water is the best lubricant and solvent in the body, and all life activities of the human body are inseparable from water.
Food source:
Food mainly comes from natural resources that can be eaten directly or indirectly in nature. Each living body has different physiological function requirements, different physiological mechanisms and different lifestyles, which leads to different foods for different living bodies.
For example, the food of herbivores such as horses is mainly grass and other substances, while the food of carnivores such as tigers is mainly animal food. The food of plants is mainly nutrients in various soils. But no matter what kind of life, the final food elements are similar.
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