Vitamin A deficiency

Vitamin A deficiency (VAD) is a lack of Vitamin A in the blood and tissues. It is common in poorer countries but rarely seen in more developed countries.

Pronunciation

Vitamin: /ˈvaɪtəmɪn/ Deficiency: /dɪˈfɪʃ(ə)nsi/

Etymology

The term "Vitamin A" comes from the Latin word "vita" meaning "life" and the term "amine" which was originally thought to be a part of vitamins. "Deficiency" comes from the Latin word "deficientia" meaning "a lack or shortage".

Symptoms

Symptoms of Vitamin A deficiency can include dry skin, night blindness, and increased susceptibility to infections. In children, severe Vitamin A deficiency can lead to xerophthalmia, a disease that can damage the cornea and lead to blindness.

Causes

Vitamin A deficiency is usually caused by a diet lacking in Vitamin A, but can also be caused by diseases that interfere with the absorption of the vitamin from the intestine. These can include celiac disease, Crohn's disease, and cirrhosis of the liver.

Treatment

Treatment for Vitamin A deficiency involves increasing intake of Vitamin A through diet or supplements. Foods high in Vitamin A include carrots, sweet potatoes, and spinach. In severe cases, Vitamin A can be given as an injection.

Related Terms

External links

Medical encyclopedia article on Vitamin A deficiency
Wikipedia's article - Vitamin A deficiency

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Vitamin A deficiency