October 7, 2011
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Vitamin D It represents a group of biologically active substances, which includes holekaltsifero, ergocalciferol and other substances.
First, vitamin D was seen as a factor against doctors rickets . Cod liver oil, rich in these substances, used for medicinal purposes against rickets since ancient times, but associate with the therapeutic effect of the presence in it of vitamin D was only just at the beginning of the 19th century. And a century later, it was noted that sunbathing help saturate the body that Vitamin not worse.
At the beginning of the 20th century it was discovered vitamin formula, made it a German professor, winner of the Nobel Prize for Medicine, which was awarded for the study of vitamins. Since vitamin D has been assigned to the vital substances.
The main functions of Vitamin D:
- Providing normal bone development, growth
- Prevention of osteoporosis, rickets, softening of bones
- The regulation of mineral metabolism
- Promotes the deposition of calcium in the bone tissue
- Affect the overall metabolism
- Increases immunity
- It ensures proper functioning of the thyroid gland
- It normalizes blood clotting
- It regulates blood pressure and heartbeat
- It prevents the growth of cancer cells
- Increases resistance to infections and viruses
- It provides the production of agents for calcium transport enhances its reabsorption, increases its absorption in the intestine, increases the permeability of the epithelium to calcium.
To generate the required amount of vitamin D you need only half an hour a week in the sun to appear. Thus, various protective means can not be used because they can block sunlight on the skin to nearly 100%. Even protective agent with a small degree of protection SPF15 will miss no more than a tenth of the sunlight. Elderly and people with dark skin need more time in the sun.
For people completely abandon animals fat Or even switched to vegetarianism, a shortage of vitamin D can turn into a real disaster: the fact that this vitamin is fat-soluble, which means that in the absence of fat in food is impossible to assimilate. Vitamin A deficiency is very common, especially during the cold season, when the sun is not seen. The decrease in the absorption of calcium, vitamin D deficiency can affect the most serious health problems ranging from joint pain to cardiovascular diseases , Kidney problems, etc.
Many multivitamin complexes, as well as food products are composed of vitamin D. Research at Boston University, sponsored by the manufacturer of one of the most popular sodas in the world have shown that vitamin D is able to be absorbed by the body through the fortified drinks and juices. As a result, this company is required to resolve the addition of vitamin D in the drinks.
As with almost any other vitamin, vitamin D in an excess amount is quite toxic to the human body. He can raise deposits calcium in kidneys , Provide resorption of the skeleton . disrupt the heart and blood vessels . However, such cases are extremely rare, especially for the inhabitants of the middle latitudes. Get a higher dose of vitamin intake can only be through sunbathing can not do this: in the latter case, the required dose of the body sends to their needs, and the rest will store up in the liver to the worst times, any excess will simply not be produced.
Symptoms giperavitominoza is weakness . diarrhea and constipation , Acute headache And pain in joints and muscles, increased body temperature and Blood Pressure , Shortness of breath, convulsions .
Contraindications preparations containing Vitamin D:
- Organic heart disease
- Duodenal ulcer and stomach
- Hypercalcemia
- Acute kidney disease and liver
Need
The need for adult men and women for vitamin D is 2, 5 mg a day for children up to three years, pregnant and nursing mothers need about 10 g of substance. People who live in the north, in areas where there is little sun are most prone to deficiency of vitamin D.
Among the main sources of vitamin D are the following:
- Plant origin: nettle, parsley, alfalfa;
- Animal origin : Eggs, fish oil, cheese, dairy products (consumption of dairy products may not always cover the entire need for vitamins, often because they contain low doses), butter, egg yolk.
Symptoms of deficiency
The most serious consequences of vitamin deficiency are: rickets, softening, etc. Mild forms of deficit entail insomnia, development of visual impairment, burning sensation in the throat and mouth, weight loss, loss of appetite etc.
Interesting facts
As shown by recent studies, vitamin D is able to help the body in the fight against cancer cells . They have special areas that are under the influence of vitamin slow down their livelihoods. Vitamin has shown good efficacy in the treatment of Breast Cancer . Women aged 50 years could much easier to deal with the disease when present in their diet daily requirement of this substance.
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