Vitamin A deficiency is a common nutritional deficiency worldwide. It severely affects children and pregnant women in poor countries. It can cause eye problems, weaken immunity, and disrupt the formation of red blood cells.
Vitamin A maintains epithelial tissues and forms rhodopsin in the retina. Without enough vitamin A in the diet, health problems arise. Malabsorption can also cause deficiency.
Let’s find out the causes and effects of vitamin A deficiency. We will also look at foods rich in this essential nutrient.
What is vitamin A deficiency?
Vitamin A deficiency affects millions of people around the world. It is a serious problem for children under five in developing countries. About 190 million children suffer from this deficiency.
India contributes 85% of cases in Southeast Asia. Globally, 122 countries face this problem at the biochemical level. Another 45 countries are experiencing it at the clinical level.
Importance of vitamin A in the body
Vitamin A is crucial for our body. Helps vision, immune system and reproduction. It also keeps the skin and mucous membranes healthy.
Adequate intake prevents vision problems such as night blindness. In addition, it strengthens the body’s defenses against infections. It is vital for maintaining good overall health.
Roles of Vitamin A in Vision and Health
Vitamin A is essential for vision. It produces pigments necessary for the functioning of the retina. A lack of it can cause night blindness and other eye problems.
This vitamin nourishes and protects the cornea and other parts of the eye. Prevents dry eyes and maintains good lubrication. It’s also important for your skin.
Vitamin A keeps the mucous membranes of the lungs, intestine and urinary tract healthy. This strengthens the body’s protection against infections and external agents.
Causes of Vitamin A Deficiency
A lack of vitamin A has several causes. The most common are poor diet and medical problems. Some groups are at higher risk of suffering from this deficiency.
Diet low in vitamin A
A diet without foods rich in vitamin A is a major cause. Dark orange and green fruits and vegetables are important sources. So are foods of animal origin such as liver, eggs and dairy products.
Without these foods in your diet, you could develop a deficiency. This can cause problems such as Bitot spots and dry skin.
Absorption disorders and liver disease
Some diseases affect how the body absorbs vitamin A. This includes celiac, intestinal inflammation, cystic fibrosis, and liver problems. With these conditions, your body may not absorb vitamin A well.
It is crucial to work with a doctor to manage these diseases. This ensures good nutrient intake and absorption. This helps avoid problems such as Bitot spots and dry skin.
Risk groups: young children and pregnant women in low-income countries
In developing countries, vitamin A deficiency is a serious problem. This is due to limited diets, malnutrition, and frequent infections. Young children and pregnant women are the most vulnerable.
Their vitamin A needs are increased by growth. Infections can deplete the body’s stores of vitamin A. This increases the risk of deficiency and its consequences.
Symptoms and consequences of vitamin A deficiency
A lack of vitamin A can seriously damage health, especially eyesight. A main symptom is night blindness, which makes it difficult to see in low light. If left untreated, it can cause xerophthalmia, drying out and damaging the eyes.
Xerophthalmia can cause corneal ulcers and permanent blindness from scarring. This deficiency also affects the skin and mucous membranes, increasing the risk of infections. Vitamin A is crucial for a strong immune system.
In developing countries, this deficiency causes avoidable blindness in children. It affects between 250,000 and 500,000 children a year. Unfortunately, half die the year after going blind.
Pregnant and breastfeeding women are particularly vulnerable to this deficiency. They can suffer from night blindness and increased risk of mortality due to a weak immune system. It is vital to ensure sufficient vitamin A in the diet.
If necessary, supplementation can be made under medical supervision. Early diagnosis and treatment are key to avoiding irreversible damage to eyesight and protecting overall health.
