Vitamin A (retinol and other retinoids) and provitamin A (β-carotene and other carotenoids) affect virtually all organs and systems of the body and play a crucial role in its normal functioning.
Vitamin A is a group of similar fat-soluble substances (retinol and other retinoids) that enter the human body with products of animal origin. Vitamin A can also be synthesized directly in the human body from provitamin A, supplied with plant food. Vitamin A does not dissolve in water, but in order to assimilate it and bring benefits to the body, a fatty environment is necessary. At culinary processing of products, up to 50% of this vitamin is lost. Both deficiency and excess of vitamin A in the human body can cause serious diseases.
Vitamin A is very important for the proper functioning of the immune system; it protects the body from many viruses and infections.
The importance of the vitamin A is also proven for the cardiovascular system; it does not allow accumulating harmful cholesterol and helps endocrine system function normally.
The state of the human skin depends on the amount of this vitamin. A sufficient intake of vitamin A helps restore all layers of damaged tissue and cope with a variety of skin problems, such as eczema, psoriasis, acne, burns, wounds, and so on. That’s why some people call vitamin A as a “skin” vitamin.
Vitamin A is very important for vision. It affects the condition of the retina, the perception of light by photoreceptors, as well as color perception.
Vitamin A helps regulate metabolic processes and the synthesis of protein compounds in the body.
It participates in the formation and growth of new cells and affects tissue respiration.
Vitamin A has antioxidant properties and contributes to slowing down the aging process in the body, preventing the onset and development of cancer.
In pregnancy, vitamin A is necessary not only for women but also for the developing fetus for its normal nutrition and development. This vitamin is very important for the normal physical and mental development of children and adolescents since it is involved in almost all the basic functions of the body.
The interaction of vitamin A with other substances:
- to ensure that vitamin A is well absorbed, the body should have enough vitamins E, D, group B, as well as zinc, calcium, and phosphorus
- as already mentioned above, a fatty environment is necessary for the assimilation of vitamin A. Therefore, when using products containing carotenoids (provitamin A), it is necessary to add vegetable oil or sour cream
- alcohol and certain medications prevent the absorption of vitamin A.
The daily need for vitamin A depends on sex, age, physical and mental loads, weight, and even climate and season.
The daily need for this vitamin in men is about 1000 mkg, for women – about 800 mkg, for children and adolescents – 300-700 mkg depending on age and weight. The need for vitamin A increases during breastfeeding, illness, in a hot period, with severe physical exertion. In such cases, you can take Accutane and other drugs from pharmacies based on retinol.