Vitamin A deficiency happens when your body doesn’t get enough vitamin A. Diet lacking in vitamin A and certain disorders can cause vitamin A deficiency. Symptoms include vision issues such as night blindness.

2023年3月13日 · Vitamin A is a fat-soluble nutrient essential for healthy vision, immune system, fertility, and skin. Symptoms of vitamin A deficiency include vision trouble, difficulty conceiving, dry or...

Vitamin A deficiency (VAD) or hypovitaminosis A is a lack of vitamin A in blood and tissues. [1] . It is common in poorer countries, especially among children and women of reproductive age, but is rarely seen in more developed countries. [1] .

2023年5月12日 · When you don't get enough vitamin A in your diet, you may be at risk of developing a vitamin A deficiency. Over time, this can lead to numerous health concerns including vision problems,...

2023年1月2日 · Vitamin A deficiency can lead to ophthalmological, dermatological, and immune impairment. This activity addresses the complications of vitamin A deficiency and how to treat affected patients. Objectives: Describe the metabolism of Vitamin A in the body. Identify common manifestations of Vitamin A deficiency.

2022年3月18日 · Vitamin A deficiency can result from inadequate intake, fat malabsorption, or liver disorders. Deficiency impairs immunity and hematopoiesis and causes rashes and typical ocular effects (eg, xerophthalmia, night blindness). Diagnosis is based on typical ocular findings and low vitamin A.

Vitamin A deficiency is common among people who have had a severe deficiency of protein and calories (protein-energy undernutrition) for a long time. People with this disorder do not consume enough vitamin A, and storage and use of vitamin A is impaired.

2024年8月7日 · What Is a Vitamin A Deficiency, and Who Is at Risk? A vitamin A deficiency occurs when the body doesn't get enough vitamin A, a fat-soluble vitamin. It's important for healthy vision, a strong immune system, reproduction, and growth and development.

2021年1月12日 · Vitamin A is an important nutrient that plays a role in many crucial bodily functions. A deficiency may occur when a person does not get enough vitamin A to cover their body’s needs, and may...

Frank vitamin A deficiency is rare in the United States. However, vitamin A deficiency is still common in many developing countries, often as a result of limited access to foods containing preformed vitamin A from animal-based food sources and to foods containing provitamin A carotenoids because of poverty or traditional diets [1,26].