all about vitamin A and daily requirement in human life tips to prevent eye loss in early stage

Note: This is Raw Post, try understand better.

25,000 IU of vitamin A is equivalent to 7.5 mg of all-trans-retinol.

beta-carotene, has not been associated with vitamin A toxic effects

The National Research Council’s recommended dietary allowance for vitamin A during pregnancy is 1,000 retinol equivalents (RE)/day, which is equivalent to 3,300 IU as retinol or 5,000 IU of vitamin A 

Supplementation of 8,000 IU vitamin A (as retinol/retinyl esters) per day should be considered the recommended maximum prior to or during pregnancy 

1 mcg of  Retinol is assumed to be biologically equivalent to 6 mcg of beta-carotene or 12 mcg of mixed dietary carotenoids.

http://teratology.org/pubs/vitamina.htm

An mcg is a micro-gram, while an mg is a milligram. There are 1000 micro-grams in 1 milligram, and there re 1000 milligrams in one full gram.

http://www.ask.com/question/how-many-mcg-make-1-mg

 
http://www.twydil.com/en-twyd/tools2/3.vit/fr4vita8.htm

retinal vs retinol retinal retinol difference

• Retinol is actually the natural animal form of vitamin A. It is a part of the food we eat to nourish our bodies.

• Retinol is a form of Vitamin A that plays an important role in anti-aging skin care. The purest and most active form of Vitamin A, Retinol aids in the resurfacing and rejuvenating of skin – See more at: http://www.chacha.com/question/what-is-the-difference-between-retinol-and-retinal#sthash.9B901h7o.dpuf

  retinal although retinal, or vitamin A aldehyde, is the form involved in the visual process in the retina of the eye. A metabolite of retinol with high biological activity may be an even more direct active form than retinol

 A vitamin tablets retinyl palmitate daily dose one
retinyl palmitate contains 25000 iu vitamin a or 7.5 mg of retinol
the company USV limited the cost for 30 capsule 21 Rupees in Indian currency.
does retinyl palmitate work

The Daily Value for vitamin A is 5,000-7,000 IU.

vitamin A consumption while sitting on computer per hour.

vitamin A toxicity limit
Children (ages 4 to 8): 3,000 IU
Children (ages 9 to 13): 5,610 IU
Teenagers (ages 14 to 18): 9,240 IU

Adults (age 19 and older): 10,000 IU

Excessive use of alcohol: Drinking alcohol may increase vitamin A’s potentially harmful effects on the liver.

vitamin a food sources list by percentage measurement

Source: USDA National Nutrient Database for Standard Reference, Release 18

Vitamin A is found naturally in many foods:

http://en.wikipedia.org/wiki/Vitamin_A
http://en.wikipedia.org/wiki/Retinol
http://en.wikipedia.org/wiki/Retinal

documents

http://whqlibdoc.who.int/hq/1998/WHO_NUT_98.4_eng.pdf

http://www.supernutritionusa.com/images/pdfs/VitaminALongVersion.pdf

1. ^ Composition of Foods Raw, Processed, Prepared USDA National Nutrient Database for Standard Reference, Release 20 USDA, Feb. 2008
2. ^ Jump up to: ^{a b} Chapter 4, Vitamin A
3. “Alleviation of vitamin A deficiency with palm fruit and its products”
4. UNICEF, Vitamin A Supplementation: A Decade of Progress
5. • UNICEF, Vitamin A Supplementation: A Decade of Progress, UNICEF, New York, 2007.
   • Flour Fortification Initiative, GAIN, Micronutrient Initiative, USAID, The World Bank, UNICEF, Investing in the Future: A United Call to Action on Vitamin and Mineral Deficiencies, 2009.