Vitamin A deficiency occurs when the body lacks this substance for normal functioning. This can lead to impaired vision and even blindness, as well as problems with the skin, heart, lungs, immune system, and body tissues. Vitamin A is important for vision, metabolism, and cell development. It is necessary for maintaining the health of the immune and reproductive systems. The body does not produce vitamin A on its own, so it must be obtained through food.
How does vitamin A deficiency affect vision?
Eyes need vitamin A to form the pigments necessary for proper retinal function. A deficiency leads to impaired night vision and dry cornea. This can cause corneal damage and ultimately lead to vision loss.
What body systems suffer from a lack of vitamin A?
•
Vision
: impaired pigment formation and eye lubrication.•
Skin
: dryness, itching, peeling.•
Reproductive system
: difficulties with conception, infertility.•
Immunity
: increased risk of respiratory infections.•
Development in children
: slowed growth and development.
What signs can indicate vitamin A deficiency?
One of the first symptoms is night blindness (nyctalopia): vision worsens in low light conditions, although it remains normal in good light.
Why does vitamin A deficiency occur?
Main reasons:
1.Lack of vitamin in food (especially in developing countries).
2.Liver dysfunctions – the main storage organ for vitamin A.
3.Diseases that interfere with fat absorption, for example:
•Chronic diarrhea.
•Celiac disease.
•Cystic fibrosis.
•Pancreatic disorders.
•Gallbladder diseases.
•Zinc or iron deficiency.
•Intestinal or stomach surgeries.
•Alcohol abuse.
How to diagnose vitamin A deficiency?
A doctor will diagnose based on symptoms and a blood test for vitamin A levels.
How to prevent vitamin A deficiency?
The best way is a balanced diet that includes foods rich in vitamin A:
•Green vegetables (spinach, broccoli).
•Orange and yellow vegetables (carrots, pumpkin, sweet potatoes).
•Fruits (mango, papaya, melon, oranges).
•Liver, beef, chicken.
•Fish (salmon).
•Dairy products and eggs.
•Fortified cereals and soy products with vitamin A.
If necessary, vitamin A supplements can be taken.