"War" between Manganese and Iodine
At present, CCTV broadcasts "Breaking the Casserole to the End", and reports that 960 products with specifications of 865 and 438+0 such as Supor milk pot, steamer and electric kettle have excessive manganese content, saying that this "will lead to Parkinson's disease".
In fact, manganese is one of the essential elements for human body. For human body, manganese and iron are very similar. Most people know that iron is an essential trace element for human body. Iron deficiency can lead to a series of symptoms, such as drowsiness, weakness, anemia and so on. And too much iron can cause iron poisoning.
The situation of manganese is similar. It is a component of human connective tissue, bones, coagulation factors, sex hormones and so on, and it is also an indispensable substance for fat and carbohydrate metabolism, calcium absorption, blood sugar regulation and so on. Normal brain and nerve function can not be separated from its participation, and manganese deficiency will affect nerve development. Like iron, too much manganese can do harm to human body. Excessive manganese will inhibit the absorption of iron, and long-term excessive manganese will affect the function of nervous system-the news that "excessive manganese leads to Parkinson's disease" is not out of thin air.
Coincidentally, for the iodized salt that people have been using, experts also pointed out that excessive intake will cause thyroid dysfunction, induce hypothyroidism, with or without gland enlargement, and change the occurrence and types of thyroid tumors.
The World Health Organization recommends that the salt intake per person per day is 6 grams, but China people generally exceed 20 grams. Therefore, iodine-free salt must be provided for people to choose at the same time, otherwise there is a great risk of excessive iodine intake.
They are the "bosses" of the human body
In fact, in the human body, manganese and iodine are "little brothers", and there are many elements more than them. In other words, our whole human body is made up of chemical elements, which are divided into macro elements and trace elements.
Macro elements, also known as macro elements, refer to inorganic salts with a content greater than 0.05% of body weight and organic elements such as carbon, hydrogen, oxygen, helium, phosphorus, sulfur, chlorine, potassium, sodium, calcium and magnesium 1 1, which constitute the musculoskeletal organs of human body and are essential elements for human body composition and life. Specifically, the human body contains 65% oxygen, 18% carbon, 10% hydrogen, 3% nitrogen, 1.5% calcium, 1% phosphorus, 0.35% potassium and 0.25%.
Calcium, which accounts for about 1.5% of human body weight, is undoubtedly very important. Among them, 99% exists in bones and teeth in the form of calcium hydroxyphosphate, and the proportion in blood also reaches 0. 1%. Calcium ions can promote the conversion of prothrombin into thrombin, and make the blood at the wound coagulate. Calcium plays an important role in many other physiological processes.
Calcium is also a good sedative, which helps to transmit nerve stimulation and relax nerves, while nerves lacking calcium will become nervous, irritable and insomnia. In addition, calcium can also reduce the permeability of cell membrane and prevent harmful bacteria, viruses or allergens from entering cells.
The daily calcium requirement of adults is more than 1.0g, but it should not be too large. Milk and dairy products are ideal sources of calcium. In addition, sea cucumber, topaz, sesame, broad bean, shrimp skin, cheese, wheat, soybean, mustard and honey are also rich in calcium. Appropriate amount of vitamin D3 and phosphorus is beneficial to the absorption of calcium.
Other elements, such as oxygen, carbon, nitrogen, sulfur and phosphorus, play an important role in human body, such as sugar, protein, fat, growth factor, coenzyme and hormone. Macro-elements restrict each other.
The content of magnesium in human body is about 0.05% of body weight, and it is one of the essential nutrients for living things. 50% of magnesium in human body is deposited in bones, followed by cells and blood. Magnesium, like calcium, has the function of protecting nerves and is a good sedative. When magnesium is seriously deficient, it will make the brain confused, lose its sense of direction, produce hallucinations and even be insane. Magnesium is the main catalyst for lowering blood cholesterol and preventing atherosclerosis, so taking enough magnesium can prevent heart disease. Magnesium is also an activator of many enzymes in human and mammals. Every cell in human body needs magnesium, which plays an important role in the synthesis of protein, the utilization of fat and sugar, and hundreds of enzyme systems. Because most enzymes contain VB6, it must be combined with magnesium to be fully absorbed and utilized. Lack of one of them will lead to spasm, tremor, insomnia, nephritis and other symptoms, so the combination of magnesium and VB6 can treat epilepsy.
However, if there is too much magnesium, magnesium, calcium and phosphorus will be lost from feces and urine, leading to muscle weakness, dizziness, disorientation, nausea, slow heartbeat, vomiting and even loss of consciousness. Therefore, the intake of calcium, magnesium and phosphorus should be appropriate and proportional, so as to ensure your health and longevity. The best sources of magnesium are nuts, soybeans and green vegetables. Men need magnesium more than women.
Sodium, potassium and chlorine are also major elements in human body, accounting for 0. 15%, 0.35% and 0. 15% of body weight respectively. Potassium mainly exists in intracellular fluid, sodium in extracellular fluid, and chlorine in both intracellular and extracellular body fluids. These three substances can keep body fluids close to neutrality; Determine the amount of water in the tissue.
Potassium is mainly supplied by vegetables, fruits, grains and meat, while sodium and chlorine are supplied by salt. Potassium and sodium in the human body must be balanced with each other. Too much sodium will make potassium lose with urine, and too much potassium will also make sodium lose seriously. According to a survey in the United States, most people who died of heart disease under the age of 50 were due to the lack of potassium in myocardial cells, so it is suggested to take a balanced intake of potassium, sodium, magnesium and calcium every day to ensure good health.
Iodine deficiency can cause goiter, and iodine deficiency in children can affect growth and development, causing mental retardation. Excessive iodine can also cause goiter.
Iodine deficiency (1DD) is a serious public health problem in 130 countries in the world. Significant progress has been made in reducing iodine deficiency disorders through global salt iodization efforts, but it is estimated that 50 million people are still affected by iodine deficiency disorders to varying degrees, showing different degrees of brain injury symptoms. Some indispensable elements
In addition to macro elements, there are many trace elements in human body.
Trace elements refer to some elements whose content in human body is less than 0.0 1% of body weight and only accounts for 0.05% of the total weight of elements in human body, which have important biological functions under suitable low concentration conditions. In addition, according to the human demand for trace elements, it can be divided into essential trace elements and non-essential trace elements.
At present, the essential trace elements recognized by most people are: iron, copper, zinc, cobalt, molybdenum, manganese, vanadium, tin, silicon, selenium, iodine, fluorine, nickel 14.
Trace elements in human body are mainly dissolved in human blood. Although the demand in human body is very low, it plays a great role.
Specifically, the content of iron in human body is about 4 ~ 5g, and its function in human body is mainly to participate in the formation of hemoglobin and promote hematopoiesis. The content of hemoglobin is about 72%. Spinach, lean meat, egg yolk and animal liver have high iron content.
The content of copper in normal adults is 100 ~ 200mg, and its main function is to participate in hematopoietic process. Enhance disease resistance; Participate in the formation of pigment, and the copper content in animal liver, kidney, fish, shrimp and clam is high; Fruit juice and brown sugar also have a certain content.
Zinc is called a smart element. Trace zinc can enhance memory, participate in the synthesis of various enzymes, accelerate growth and development, delay brain aging, improve human immunity, and play an important role in many physiological functions of human body. The zinc content in fish, meat, animal liver and kidney is high.
Fluorine is a normal component of bones and teeth. Can prevent dental caries and osteoporosis in the elderly. Foods with high fluorine content include cereals (wheat and rye flour), fruits, tea, meat, vegetables, tomatoes, potatoes, carp and beef. But if you eat too much fluorine, you will get fluorosis and get "dental plaque disease". When the fluorine content in the body is too high, it can also produce skeletal fluorosis and cause spontaneous fractures.
Selenium, known as the miracle element of life, needs about 0.4 mg per day for adults. Selenium has antioxidant and protective effects on red blood cells, as well as cancer prevention. Wheat, corn, Chinese cabbage, pumpkin, garlic and seafood are rich in selenium.
Cobalt is an important component of vitamin B 12. Cobalt plays an important role in protein, fat, carbohydrate metabolism and hemoglobin synthesis, and can dilate blood vessels and lower blood pressure. However, excessive cobalt can cause polycythemia, gastrointestinal dysfunction, deafness and myocardial ischemia.
Chromium can help insulin to play its role, prevent arteriosclerosis, promote protein metabolism and synthesis, and promote growth and development. But when the chromium content increases, such as long-term inhalation of chromate powder, lung cancer can be induced.
In short, trace elements, like other elements, are regulated by the homeostasis system. If the intake is too low, there will be some element deficiency. However, excessive intake of trace elements will lead to acute and chronic poisoning and even become a potential carcinogen.