Monday, October 17, 2011
Vitamins A and E For Immune System
Immune system lowers body protective potential when the body for a long time is affected by radionuclides, heavy metals, pesticides, tobacco smoke, and when the body at this time lacks such natural antioxidants as vitamins A, E, C, beta-carotene, macro- and microelements (calcium, selenium), organic components of plant tissues (bioflavonoids).
The system of antioxidant defense requires consumption of vitamins containing antioxidants as this system plays a very important role in prevention of damages caused by foreign agents. Vitamins E, A, C, beta-carotene, selenium and zinc have immune-stimulating effects – they aggravate immune response in form of virus abtibodies production and production of interferons which disturb virus production in body cells and mobilize anti-cancer immunity.
Vitamin E deficiency leads to lowering of antibodies formation and lymphocyte activity. Admission of Vitamin E increases disease-resistance at all ages and it is most useful for aged people. Nutritional sources of Vitamin E: wheat, porridges from ungrained cereals, green parts of plants, liver, egg yolk, leaf lettuce, sunflower oil.
Vitamin A perfectly stimulates immunity by activating cytotoxic functions of T-lymphocytes and macrophages which provide anti-cancer and anti-viral defebse, resistance to autoimmune and immunodeficient conditions. It is necessary to consume daily 1,5 mg of Vitamin E for the normal work of immunity and its acting against cancer.
Vitamin A deficiency leads to immunity disorders: lowering of B-lymphocites rate, disoreds in antibodies production against microbes. Here most of all is affected cell-mediated immunity: the activity of cells, which are first who monitor cancerous cells, gets lowered, If immunity works normally, those cells fight cancer at its embryon state. Remember that excessively high doses of Vitamin A may lead to balance disorder in certain parts of immune system, so high doses should not be taken. Vitamin A deficiency weakens body immune system and it cannot fight viral infections. Also vitamin A deficiency may provoke allergy for albumens, milk, chicken meat, and this shows with following signs: dry skin, small rash, loss of hair, visual loop. Vitamin A is useful for mentation, attention concentration and reaction rate. Two forms of vitamin A:
- retinol, which is ready-to-use vitamin found in butter, milk, egg yolks, fish oil, liver;
- provitamin A (carotin) found in apricots and other yellow fruits, carrots, green vegetables, cabbage, lettuce, potatoes, plum.
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