What is vitamin A?

Vitamin A is involved in the development and renewal of cells: starting with the growth of the embryo, but also in the renewal of the skin and mucous. Vitamin A plays an important role in the immune system. It also plays a vital role in vision and allows such a good dark adaptation. There is a deterioration of vision or even blindness in cases of severe deficiency in vitamin A (in the country of development).

Acne, scarring, cancer prevention.

Vitamin A is the subject of much research, especially therapeutically. Thus, a treatment with provitamin A can be proposed as a preventive measure to avoid the occurrence of lucite (rash in the early sunlight).
Studies on the preventive properties of vitamin A against cancer are contradictory. Work has been conducted on the prevention of lung cancer, but no results were inconclusive and there is even a slight increase in cancer risk.
In developing countries, vitamin A is used to fill critical food shortages. These deficiencies are often the source of blindness and the occurrence of many diseases. Pregnant very deficient, also often need vitamin A.

The Recommended Dietary Allowance (NCA)

The recommended daily intake for an adult varies between 800 micrograms (men) and 600 micrograms (women) and also changes according to age (lower among youth).
If a significant lack of vitamin A can lead to disease, an excess may also cause problems of varying severity, affecting especially the liver. Beware of excess vitamin A, particularly in people whose kidneys are functioning poorly. Generally, supplements containing vitamin A should therefore be taken with caution.