What are the functions of vitamin D? Vitamins have many functions, so vitamins are also necessary for our human body. Vitamins are classified into several categories and have different values. Let's introduce the role of vitamin D and learn about it together.
What are the functions of vitamin D? 11The British industrial revolution in the 7th century brought not only high-rise buildings, but also a smoky sky. But in those so-called big industrial areas, we often see deformed children with big heads, thin breasts and bulging like cocks. At that time, the disease was called rickets.
After that, rickets ran wild all over the world like a devil, and other systems were affected besides the skeletal system. The patient has muscle atrophy, joint relaxation, abdominal distension, gastrointestinal dilatation, and even symptoms of nervous system irritation. Serious illness is easy to get pneumonia, hepatomegaly and even anemia, which eventually leads to death.
According to statistics, in 1870, there were13 children suffering from severe rickets in London, and 40% children in Manchester, another important industrial town in Britain. Even in 1920, a survey by the British government showed that 30% children in primary school suffered from rickets to varying degrees. It was not until the early 1930s that people confirmed that vitamin D deficiency was the real cause of rickets.
Vitamin D, also known as anti-rickets vitamin, or calciferol, is called "calcium guardian" and belongs to fat-soluble vitamin. It has few natural sources and is only contained in several vegetables. There are many kinds of vitamin D, among which vitamin D2- ergocalciferol and vitamin D 3- cholecalciferol are more important. Vitamin D ingested by human body is absorbed by the wall of small intestine together with fat. Vitamin D3 is more easily absorbed than vitamin D2, and is mainly stored in liver and fat. Humans and animals must take proper amount of vitamin D from food every day to maintain normal development and health.
The main functions and functions of vitamin D are:
(1) Promote the absorption of calcium in small intestine, maintain and adjust the concentration of calcium and phosphorus in plasma, and make effective use of calcium and phosphorus, thus promoting the normal development of bones and teeth and preventing nutritional rickets.
(2) Prevention and treatment of cancer. Reduce the chance of occurrence and deterioration of cancer cells and tumors, inhibit prostate cancer and reduce the risk of colon cancer.
(3) protect the health of newborns. Taking vitamin A and vitamin C at the same time can promote the absorption of vitamin A and vitamin C, prevent colds, help treat conjunctivitis and protect the health of newborns.
The intake of vitamin D mainly comes from two ways: one is sunlight, which acts on the oil in the skin with the help of ultraviolet rays and converts it into vitamin D; One is through food intake. Although vitamin D is stable in alkali, it will be unstable once it is oxidized or heated by light, so it may lead to 40% consumption in cooking. In addition, it is generally believed that mushrooms rich in vitamin D must be irradiated by ultraviolet rays to release rich vitamin D, and patients with degenerative arthritis will have a good effect by supplementing vitamin D.
The daily requirement of vitamin D recommended by China Nutrition Society is 10 microgram per person per day for children under 06, infants, elderly people over 60, pregnant women and lactating women. /kloc-5 micrograms per person per day for teenagers and adults under 0/6.
What does vitamin D 2 1 do? One of the most well-known functions of vitamin D is to promote the absorption and utilization of calcium and phosphorus. If the human body needs calcium supplementation in time, then it needs vitamin D supplementation in time. Only when the intake of vitamin D is sufficient can calcium be well absorbed and utilized by the human body, which is the most important use of vitamin D. Many people can obtain and synthesize vitamin D in the body by sunbathing.
2. Promote normal growth of human body, improve bone hardness and make teeth healthier. Vitamin D can make calcium fully absorbed and utilized. Without vitamin d, even if you supplement a lot of calcium, you can't absorb it. The main function of calcium is to promote human growth, promote the calcification of human bones and the growth and development of teeth.
3. Vitamin D can improve the human body's absorption and utilization of phosphorus, making it easier for phosphorus to pass through the intestinal wall and glomerulus, so that phosphorus can be better absorbed and utilized by the human body. If only phosphorus is supplemented without vitamin D, then the human body cannot absorb phosphorus.
4. Keep the level of citric acid in blood at a normal level. This is one of the most unrecognized functions and functions of vitamin D.
5. Vitamin D can also prevent the loss of amino acids. If there is not enough vitamin D, amino acids can be easily separated from the body through the kidneys, leading to amino acid deficiency, and the body will naturally become unhealthy.