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Vitamin A

Vitamin A

Vitamin A is a group of fat-soluble compounds.

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Definition (Vitamin A)

V i t a m i n  A  is a group of fat-soluble compounds that can be differentiated into two categories,
depending on whether the food source is an animal or a plant:

1.  First Category

It is found in foods that come from animals is called preformed vitamin A or retinol.

2.  Second Category

It is found in fruits and vegetables is called provitamin.

Organic chemical compound (Vitamin) which are found in tiny amounts in natural food stuffs, these vitamins are needed and or required by an organism as a vital nutrient to sustain life because they play an very important role in normal metabolism process, growth and vitality. Usually we received a number of vitamins either from our diet which consider as the major source for them, or from vitamins supplements. Vitamin A deficiency can cause blindness, sickness, death, and in pregnant women can cause adverse birth defects in weight and length of the baby. It is also helps tissues in the airways, urinary, and digestive tract as the first line of defense against cold and viruses. This is needed everywhere in the body because it is very important for Human’s.

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Vitamin A supplements

Vitamin A Deficiency affects about 19 million pregnant women and 190 million preschool-age children, mostly from the World Health Organization (WHO) regions of Africa and South-East Asia. Infants and children have increased V i t a m i n  A requirements to support rapid growth and to help them combat infections. Member States have requested guidance from WHO on the effects and safety of V i t a m i n  A supplementation in infants and children 6–59 months of age as a public health strategy in support of their efforts to achieve the Millennium Development Goals.

In general where V i t a m i n  A supplementation is a public health problem, V i t a m i n  A deficiency is recommended in infants and children 6–59 months of age as a public health intervention to reduce child morbidity and mortality (strong recommendation). The quality of the available evidence for all-cause mortality was high, whereas for all other critical outcomes it was moderate to very low. The quality of the available evidence for outcomes in human immunodeficiency virus (HIV)- positive children was moderate for all-cause mortality. Click here For More About deficiency

Vitamin A sources

Vitamin A comes in two category (Forms) : One is Preformed Retinoid and Second is Provitamin Carotenoids. Pro-V i t a m i n  A is found in fruits and vegetables that contain carotenoids, which are plant pigments that are responsible for the red, orange and yellow color and convert through an antioxidant to V i t a m i n  A.

Vitamin A

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Vitamin A Dosage

The following Dosages have been studied in scientific research

For Adults By Mouth

Recommended Dietary Allowance (RDA) levels for adults are established:

Men fourteen years and older, 900 mcg/day (3000 IU);

Girls fourteen years and older, 700 mcg/day (2300 IU);

Gestation fourteen to eighteen years, 750 mcg/day (2500 IU);

Nineteen years and older, 770 mcg/day (2600 IU);

Lactation fourteen to eighteen years, 1200 mcg/day (4000 IU);

Nineteen years and older, 1300 mcg/day (4300 IU). Tolerable higher Intake Levels (UL) for V i t a m i n  A have conjointly been established.

The UL is that the highest level of intake that’s seemingly to create no risk of harmful effects. The ULs for V i t a m i n  A are for preformed V i t a m i n  A (retinol) and don’t embrace provitamin carotenoids: adolescents fourteen to eighteen years (including gestation and lactation), 2800 mcg/day (9000 IU); adults age nineteen and older (including gestation and lactation), 3000 mcg/day (10,000 IU).

For Treat diarrhea after pregnancy: Weekly doses of 23,000 IU of V i t a m i n  A have been used before, during, and after pregnancy.

 For Children By Mouth

Recommended Dietary Allowance (RDA) levels for youngsters and adults are established:

Children one to three years, three hundred mcg/day (1000 IU);

Four to eight years, four hundred mcg/day (1300 IU);

Nine to thirteen years, 600 mcg/day (2000 IU).

Tolerable higher Intake Levels (UL) for axerophthol have conjointly been established. The UL is that the highest level of intake that’s probably to create no risk of harmful effects.

The ULs for axerophthol are for preformed V i t a m i n  A (retinol) and don’t embrace provitamin carotenoids: infants and kids from birth to three years, 600 mcg/day (2000 IU); kids four to eight years, 900 mcg/day (3000 IU); 9 to thirteen years, 1700 mcg/day (6000 IU); and fourteen to eighteen years (including physiological condition and lactation), 2800 mcg/day (9000 IU).

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Vitamin A tablets

The Following are the Tablets For Vitamin A

GNC V i t a m i n  A 10000 IU (100 softgels) is the brand name of tablet.

Vitamin A Function

Vitamin A helps kind and maintain healthy teeth, skeletal and soft tissue, secretion membranes, and skin. it’s additionally called A as a result of it produces the pigments within the membrane of the attention.

V i t a m i n  A promotes smart vision, particularly in low light-weight. it’s going to even be required for replica and breastfeeding.

Retinol is a vigorous variety of fat-soluble vitamin. it’s found in animal liver, whole milk, and a few fortified foods.

Carotenoids are dark-colored dyes (pigments) found in plant foods which will become a variety of fat-soluble vitamin. There are quite five hundred notable carotenoids. One such pigment is carotene.

  • Beta-carotene is associate inhibitor. Antioxidants defend cells from harm caused by substances referred to as free radicals. Free radicals are believed to contribute to sure chronic diseases and play a job within the aging processes.
  • Food sources of carotenoids like pro-V i t a m i n  A could cut back the chance for cancer.
  • Beta-carotene supplements don’t appear to cut back cancer risk.

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Vitamin A Benefits

V i t a m i n  A is a crucial and somewhat misunderstood nutrient. It’s important to such a lot of bodily functions and however many folks don’t get enough of it. this can be thanks to the mix of our dietary changes, the provision in our food sources, and our body’s unsteady rates of conversion from the inactive to the active type. These factors have clouded the apparently straightforward question – are you obtaining enough nutriment A?

When we discuss fat-soluble vitamin, many folks hear concerning toxicity. however fat-soluble vitamin deficiency is probably going a far larger downside than is commonly mentioned. Read More..

Vitamin A Structure

V i t a m i n  A or anti ophthalmic factor features a structure represented to the proper. anti ophthalmic factor is that the immediate precursor to 2 necessary active metabolites: retinal, that plays a important role in vision, and retinoic acid, that is Associate in Nursing living thing traveller that affects transcription of variety of genes. fat-soluble vitamin doesn’t occur in plants, however several plants contain carotenoids like carotenoid which will be regenerate to fat-soluble vitamin inside the bowel and alternative tissues.

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