What is vitamin A?
Like all vitamins, vitamin A is essential and the body cannot be produced in the amount needed to maintain health. This vitamin is involved in the transcription of the gene and is therefore necessary in all cells. It has a strong antioxidant activity and is particularly important for eye and skin health, immune system function and bone health. In addition, this vitamin plays an important role in reproduction, reproductive health and breastfeeding. Vitamin A is known in its precursor form as beta-carotene and in its active form as retinol. In addition, visual problems and reduced night vision may develop. People with vitamin A deficiency are exposed to increased risk of nyctalopia or night blind. This condition mak is difficult or impossible to see in a weak light. Another risk is an eye disease called keratomalacia, which causes cornea of the eyes to be very dry, irritated and cloudy.
the sameAs with most other vitamins and minerals, it is the best way to obtain a recommended healthy amount of vitamin A, eat a wide range of foods. Many foods are rich sources of this basic vitamin, including animal sources such as meat, eggs, cheese, milk and certain fish species. In addition, they are a good source of beta-carotene carrots, pumpkins, sweet potatoes, melon, broccoli, spinach and apricots. Vitamin A is fat -soluble, which means that the body can store this vitamin in the liver. It also means that vitamin is best absorbed by the body when it is consumed as part of the food containing fat.
Although it is necessary for good health, vitamin A can be toxic in very large doses. Sickness cause toxicity is known as hypervitaminosis A and can cause congenital defects, yat problems, hair loss, skin color, skin dryness and high intracranial blood pressure. In addition, this disease may increase the risk of osteoporosis. Hypervitaminosis and occurs whenThe amount of vitamin in the body exceeds the amount that the liver can store, causing the excess to enter into circulation throughout the body. In most cases, this toxicity is caused by excessive consumption of vitamin supplements containing large doses of vitamin A.