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.
Section: Vitamins