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Facts on Vitamin A Deficiency

04.29.2011 · Author: · Posted in Health & Fitness

Facts on Vitamin A Deficiency

What’s Vitamin A? What Does Vitamin A Do?
Vitamin a, sometimes called retinol as it produces pigments in the eye’s retina. The eye requires a precise metabolite – retinal – a light-absorbing substance that’s critical for scotopic vision ( low-light vision ). Vitamin An is also vital for strong teeth, skeletal tissue, soft tissue, the skin, and mucous membranes.

Vitamin A comes from 2 main sorts of foods :

Retinol – a yellow, fat-soluble substance. It’s the kind of vitamin An absorbed when eating animal food sources. Sources include cod liver oil, butter, margarine, liver, eggs, cheese and milk.

Carotenes – such as alpha-carotene, beta-carotene, gamma-carotene, and xanthophyl beta- cryptoxanthin. Carotene is an orange photosynthetic pigment crucial for plant photosynthesis. The orange colours of carrots, sweet potatoes and cantaloupe melons come from its carotene content. Lower carotene concentrations are what give the yellowish coloration to butter and milk-fat. Some omnivores have yellow-colored body fat, for example chickens and humans.
Vitamin A Deficiency

According to Medilexico medical dictionary ;
Vitamin An is “one. Any 946;-ionone derivative, except provitamin A carotenoids, possessing qualitatively the biologic activity of retinol ; deficiency meddles with the production and resynthesis of rhodopsin, thus causing night blindness, and produces a keratinizing metaplasia of epithelial cells that may cause xerophthalmia, keratosis, susceptibleness to contagions, and retarded expansion ;
2. The first vitamin A, now known as retinol.

Vitamin A deficiency is widespread in poor states and extremely rare in developed nations. Sufferers of night blindness – folks who cannot see well in soft light – are more likely to have a vitamin A deficiency. Night blindness is one of the most common signs of vitamin a deficiency. According to WHO ( World Health Organisation ), night blindness among pregnant women in developing states is worryingly high.

Vitamin A Deficiency

Expecting moms with vitamin A deficiency are much more likely to die when pregnant and childbirth, and might have Problems with lactation.

Folk with vitamin A deficiency can also develop xerophthalmia ( dry eyes ) and even complete blindness.

Between two hundred and fifty thousand and 500,000 malnourished youngsters worldwide lose their vision each year because they don’t have enough vitamin A. Half of them die inside twelve months of becoming blind.

A kid with not enough vitamin A has a more serious risk of dying of some contagious sicknesses,eg measles Low vitamin A levels make kids more susceptible to diarrhea, slow bone development, and respiratory contagions.
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