Vitamin A belongs to the fat-soluble group of Vitamins, it is stored in different body tissues and plays very important functions. The most abundant form of vitamin A is retinol, a precursor of other forms of this vitamin. Its main function is related to eye health, mainly in cornea protection. Vitamin A deficiency can lead to serious health complications, such as night blindness, which is the inability or difficulty to see in darker settings.
The eyes are very important organs for the quality of life in general. They are extremely sensitive, thus they deserve preventive care because when they are harmed, they are not easily treated. The compounds used for eye health are mainly specific antioxidants and fatty acids.
The immune system is made up of cells, tissues and organs that act in the organism’s defense against the harmful effects of external microorganisms. The supplements indicated for immunity act as strengthening agents of this system, increasing the antibodies production and, consequently, its defense activity.
Consuming too much vitamin A can negatively affect health. In extremely high doses, hypervitaminosis A may occur, which can cause liver damage and increased cranial pressure.
Vitamin A supplementation has been proved to be beneficial on iron metabolism, increasing the bioavailability of serum iron for hematopoiesis due to storage depletion, which leads to improved Absorption of dietary iron. In long term, levels of ferritin are increased. Vitamin A deficiency impairs iron mobilization and also red cell production.
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Zinc is essential for the hepatic synthesis and secretion of retinol-binding Protein, which is responsible for vitamin A transportation. In Zinc deficiency situations, the production of this protein is reduced, resulting in vitamin A deficiency, which is characterized by decreased retinol serum levels, even with adequate liver retinol levels.
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