Vitamin A deficiency
Vitamin A deficiency may cause many damages, vitamins are a group of substances that the body needs in small quantities to maintain health.
We consider Vitamin A is one of the fat-soluble vitamins. Vitamin A cannot be made by the human body, and therefore it must be an essential part of the diet.
Vitamin A is important for eye health, important for healthy skin, and for helping you fight infection.
Foods that contain Vitamin A include liver, milk, eggs and fish liver oils. Another substance called beta carotene (found in leafy green, green, and yellow fruits) can also be converted by your body to vitamin A.
Mild forms of vitamin A deficiency can usually be treated without any long-term problems. Vitamin A deficiency is most common in low-income countries, where it is often very dangerous and may cause vision loss and even death.
What is vitamin A deficiency, and how common is it?
A lack of Vitamin A is caused in your body by a lack of adequate amounts of Vitamin A in your diet. Over time, a lack of vitamin A means that you may have vision problems and be less able to fight infections
According to WHO reports on vitamin A deficiency:
- An estimated 250 million preschool-age children are deficient in vitamin A, and a large proportion of pregnant women in areas with vitamin A deficiency are likely to be deficient in vitamin A.
- Nearly 250 to 500,000 children with vitamin A deficiency suffer from blindness or night blindness each year, half of them die within 12 months of losing their eyesight.
- Vitamin A deficiency is a public health problem in more than half of all countries, especially in Africa and Southeast Asia, where it affects young children and pregnant women in low-income countries.
What are the symptoms caused by vitamin A deficiency?
We can divide Vitamin A deficiency into two main types
A slight deficiency in vitamin Mild forms, and may not show symptoms, but may appear on the body only symptoms of fatigue and fatigue
The most severe forms of vitamin A deficiency are severe and cause:
- Eye and vision problems
- Poor vision in the dark (night blindness).
- Thinning and ulceration of the cornea on the surface of the eyes (cornea).
- Dryness of the conjunctiva and cornea on the surface of the eye (dry mouth).
- Foam oval, triple or irregular spots on the whites of the eyes (called Bitot spots).
- Severe visual impairment (due to damage to the retina) in the back of the eye.
- Skin and hair problems: dryness of skin, hair, and itching
Both mild and severe forms of vitamin A may cause an increased risk:
- infections, including infections of the throat and chest, and gastroenteritis.
- Delayed growth and bone development in children and adolescents.
- Infertility and Miscarriage Abortion.
Night blindness is one of the most common diseases associated with vitamin A deficiency. We will now learn about the most important symptoms of night blindness.
Symptoms of night blindness
Night blindness has several different symptoms for the person:
- Poor vision at night: The person’s inability to see clearly in the dark, and stumbling in things while moving due to lack of vision, especially in low light.
- Blurred vision: this is an indication of a problem in the eye, it could be night blindness or other diseases.
- Keratitis: As a patient with a night blind night, the cornea can become dehydrated and irritation of the cornea more than others.
- Retinitis pigmentosa: gray spots can be seen in the white of the eye.
It took a long time to adjust the eyesight to change the lighting.
Causes of vitamin A deficiency
Vitamin A deficiency may also occur when your body is unable to utilize vitamin A in your diet or is unable to absorb it. This may be caused by a variety of diseases, including:
- Coeliac disease
- Crohn’s disease
- Giardiasis – inflammation of the intestine (intestine).
- Cystic fibrosis.
- People with pancreatic insufficiency, such as individuals with cystic fibrosis, find it difficult to absorb fat and are at greater risk of developing vitamin A deficiency because vitamin A is fat-soluble. This puts them at greater risk of developing night blindness.
- Liver cirrhosis
- Obstruction the bile flow from the liver and gallbladder to your gut.