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Vitamin A (Retinolum)
Vitamin A (or Retinolum) is the water-soluble vitamin which is found both in animal and in vegetable food. In case of need the organism can independently synthesize vitamin A from beta carotene.
Vitamin A received the name thanks to the fact that it was the first open vitamin and therefore the letter A was appropriated to it. Opening it was made by group of independent scientists in far 1913.
Retinolum is fat-soluble vitamin, so fats are necessary for its assimilation. The organism has a possibility of accumulation of vitamin A therefore there is no need constantly to accept vitamin complexes with the content of this substance.
There are two forms of vitamin A: ready (Retinolum) and carotene (provitamin). The last is capable to turn into vitamin A as a result of certain chemical changes.
It is possible to distinguish the following from the main functions of vitamin A:
- Is good antioxidant
- Regulates protein synthesis
- Normalizes a metabolism
- It is important for health of teeth and bones
- Slows down aging process
- Increases protection of mucous
- Protects from flu, upper respiratory tract infections, colds, urinogenital infections
- Retinolum is extremely necessary for normal fetation during pregnancy, it provides normal food of an embryo
- Participates in production of steroid hormones
- Is a prophylactic of oncological diseases, and also it is widely used during the postoperative period thanks to the strong antioxidant actions
- Neutralizes dangerous free radicals
- Recovers and supports epithelial fabrics
- Accelerates processes of healing at burns, wounds
- Protects membranes of brain cells
- It is used for prevention of cardiovascular diseases
- It is very widely used in dermatology and cosmetology
- Plays an important role in forming of new cells
- Thanks to development of a pigment of rhodopsin provides a scotopia
- Supports moistening of eyes, protecting from drying
- Vitamin A is necessary for the correct functioning of immune system, providing fight against bacteria
- Protects from atherosclerosis
Lack of vitamin A
The lack of vitamin A is characterized by a number of symptoms: dryness and a peeling of skin, deterioration in a scotopia, the dry, exfoliating nails, the keratosic hair follicles, a growth inhibition at children's age, keratinization of mucous membranes.
Symptoms of excess of Retinolum is the exacerbation of pancreatitis, slackness and drowsiness, a hyperemia of the person, vomiting and nausea, the lower extremity pains, headaches, an exacerbation of cholelithiasis. Thus, vitamin A is a far rather offensive vitamin which needs to be accepted strictly on a dosage.
Main sources of vitamin A: liver, fish oil, yolks egg, butter, whole milk and dairy products, green and yellow vegetables, bean, caviar, palm and sea-buckthorn oil. To provide all need of an organism for vitamin A only from food stuffs very difficult therefore doctors advise at least 2 times a year to accept the drugs containing Retinolum.
Interaction with other substances
- In combination with vitamin E protection of Retinolum against oxidation in intestines and its fabrics is provided. Thus it turns out that shortage of vitamin E will be results in insufficient comprehensibility of vitamin A, so, it is necessary to accept them in a complex.
- Insufficient content of zinc in an organism does not allow vitamin A to pass into its active form. It is connected with the fact that at deficit of zinc synthesis of protein which connects Retinolum decreases, as a result vitamin can badly be transported to fabrics. Vitamin A also promotes assimilation by a zinc organism, it causes their interrelation.