Vitamin A
Known as Retinol, one of the important vitamins of the human body, which dissolves in some fats and acids within the body, is obtained from animal or plant sources, and is useful to many internal organs, such as the heart, lungs, and can be dispensed with Because of its sources in the small intestine, which in turn stored in the human body.
Causes of vitamin A deficiency
There are a number of reasons that lead to vitamin A deficiency, including:
- Malnutrition: People who stay away from foods that contain animal fats are more likely to have vitamin A deficiency.
- Lack of absorption of the body: Some may suffer from digestive diseases, or from frequent urination, and this leads to a lack of vitamin A in the body; because of the inability to absorb it.
- Do not store it in the body: In case of suffering from inflammation of the liver, this will lead to the inability of the body to store vitamin A inside.
Symptoms of vitamin A deficiency
A patient with vitamin A deficiency has a range of symptoms:
- Growth delays in the human body, especially in children.
- The body can not resist and fight infectious diseases because of the weakness of the immune system.
- Inflammation of the eyes, and feeling the need to choke, and may become unable to see clearly, and also suffer cornea drought and fog; because of the cessation of glands tears of its work.
- Respiratory problems such as nasal congestion, otitis media, and pulmonary edema.
- Skin dryness and peeling, and feeling the need to rub it; due to problems in the thyroid gland.
- Reduce the exit of the digestive juices, which help digestion.
- Loss of appetite for food.
Benefits of Vitamin A.
Vitamin A has a range of benefits that positively affect human life.
- Protects against cancer; many studies and research have shown that eating vitamin A protects the body from lung cancer, especially among smokers, but these studies still need more clarification.
- It keeps your eyes from getting dementia and dark vision, and the absence of vitamin A results in visual problems. It is therefore important to eat foods rich in beta-carotene, a vitamin A, which keeps the eyes.
- Helps the skin to produce collagen, which reduces the incidence of wrinkles, and prevents the spread of acne, and get rid of damage to the sun.
- Contributes to the growth of hair by regulating the production of retinoic acid, which strengthens hair follicles, which helps to grow it perfectly.
- It is important for most of the body’s internal organs, such as the heart, respiratory system, bones and nervous system.