Although the content of metal elements in the body is very small, their role in the process of life cannot be underestimated. Without these essential metal elements, the activity of enzymes will be reduced or completely lost, and the synthesis and metabolism of hormones, protein and vitamins will be hindered, making human life difficult to continue. Among the essential elements for life, there are 14 metal elements * * *: iron, copper, zinc, molybdenum, chromium, tin, potassium, sodium, calcium and magnesium ... Among them, the content of potassium, sodium, calcium and magnesium accounts for more than 99% of the total metal elements in human body, while the content of the rest 10 elements is very high. If the human body lacks some major metal elements, it will cause human dysfunction, but this rarely happens, and the macro elements contained in the general diet are more than enough. For example, sodium and potassium are important components of human body fluids. Normal people need 5 ~ 10g of salt every day. Too little sodium and potassium will make you feel weak and even cause arrhythmia and unconsciousness; Too much sodium can lead to high blood pressure and heart disease, so don't eat too salty.
Calcium is the main component of bones and teeth. Children with calcium deficiency will get rickets, and adults with calcium deficiency will get rickets. Blood also contains a small amount of calcium, which plays an important role in blood coagulation.
Iron is an essential element for exchanging and transporting oxygen in blood, and many redox systems in organisms cannot do without it. Most iron in the body is distributed in special blood cells. Life can't live without iron.
Zinc is a vital element to life, and it plays the role of "life gear" in transforming substances and exchanging energy in the process of life activities. It is necessary to form a variety of protein. The zinc content in the visual part of eyeball is as high as 4%, which shows that it has some special function. Zinc deficiency in children will cause developmental retardation and affect intelligence and vision. Zinc is ubiquitous in real food. As long as it is not a partial eclipse, the human body generally does not lack zinc.
Copper is also important. It is a unique and extremely effective catalyst in biological systems. Copper is the active component of more than 30 kinds of enzymes and plays an important role in regulating human metabolism. Copper deficiency can also lead to hair loss and affect the development of the brain. It is reported that coronary heart disease is related to copper deficiency. Copper is not easy to remain in the human body and needs to be ingested and supplemented frequently. Tea contains trace copper, so drinking tea often is beneficial.
Manganese participates in many enzyme-catalyzed reactions and is inseparable from all living things.
Chromium is an essential element to participate in the sugar or fat metabolism of insulin and to maintain normal cholesterol.
Molybdenum is a component of an enzyme that catalyzes the conversion of purine to uric acid. Molybdenum is also necessary for the energy exchange process. Trace molybdenum is a component of eye pigment. Pod, Chinese cabbage and Chinese cabbage contain more molybdenum. Eating more vegetables is good for your eyes.
……
Higher animals have a complex system to receive the information brought by their living environment, and transmit the information to the commander-in-chief of life-the brain through nerves, and then the brain can issue various instructions to instruct various departments in the body to respond accordingly. In this transmission and command system, metal elements also play a key role.
Metal elements also make a great contribution to the family line. The reason why a cell can replicate the next generation of cells like it is because each cell contains a nucleic acid that can transmit genetic information, which can indicate that various amino acids are connected in a specific order to form a specific protein. The process of synthesizing the next generation protein according to the genetic code is controlled by some metal elements.
Therefore, more and more people believe that the survival and development of human beings are absolutely inseparable from the absorption, transmission, distribution and utilization of these essential metal elements. In human body, although the content of metal elements is far less than that of sugar, fat and protein, their functions are no less than that of sugar, fat and protein. In addition, scientists have realized through research that using these metal elements is not as simple as eating rice, steamed bread, fish, vegetables and fruits. For example, it has been assumed that the molecular structure center of vitamin B 12 is cobalt ion, which means that vitamin B 12 is a compound of cobalt, so if vitamin B 12 is lacking, you should eat more cobalt salts. But the fact is not so simple. Eating pure cobalt salt is not only ineffective in treating vitamin B 12 deficiency, but also slightly toxic. Only taking vitamin B 12 is really effective. It seems that there is still a lot of knowledge in using metal elements.
Generally speaking, everything is rich in metal elements, and salt and natural water also contain various metal elements. They are the main sources of metal elements in human body. There are certain contents of metal elements in human body. Too little or too much will affect health and cause diseases. Therefore, people should scientifically match meat dishes, vegetarian dishes, coarse grains, flour and rice in their diet to ensure human health. Since metal elements are so important to our health, how can we supplement them? Milk, dried shrimps, kelp, milk powder, sesame paste, peanuts, vegetables, beans and bean products are rich in calcium. In order to improve the absorption rate of calcium, foods containing more iron, such as animal liver, heart, lean meat, egg yolk, laver, kelp, auricularia auricula, celery, rape and tomato, must be ingested at the same time. Protein and vitamin C in the diet can improve the absorption rate of iron. The main source of sodium is salt in the diet. So the diet should not be too salty. The daily salt intake of adults should be controlled at 2,000 mg-2,500 mg. People living in hard water areas don't need to be magnesium-free, because they have taken enough magnesium from drinking water and nuts, seeds and green vegetables. People who often eat a lot of milk or meat should increase their intake of manganese. Zinc is abundant in meat, animal liver, eggs and seafood, especially oysters. Secondly, milk, cereal, corn and pumpkin seeds also contain zinc. When it works with vitamin A, calcium and phosphorus, the effect is the best. Eating foods containing chromium such as beef liver, malt, yeast, chicken, corn oil and clams can make up for the deficiency of chromium. Only by taking in a proper amount of trace elements can our bodies become healthier.