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 

Retinyl palmitate  C36H60O2
 Retinal   Formula: C20H28O

 

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

1 I.U.=0.3mcg vitamin Aalcohol (retinol)
=0.344mcgvitamin Aacetate (retinyl acetate)
=0.55mcgvitamin Apalmitate (retinyl palmitate)
or, measuring the activity of 1 mg of each compound:
1 mg
retinol =
3,333I.U.vitamin A
1 mg
retinyl acetate =
2,907I.U.vitamin A
1 mg
retinyl palmitate =
1,818
I.U.
vitamin A

 
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

vitamin a deficiency test

 Through blood sample test along with other vitamins and minerals. fasting and no alcohol consumption for 24 hours required. more…

Normal values range from 50 to 200 micrograms per deciliter. nih us.

Beta-carotene blood test pro vitamin a from plants 

The normal range is 50 to 300 micrograms per deciliter.
if vitamin toxicity appear also try make Liver function test.

daily need of vitamin a

950 mcg of vitamin a  above 3000 mcg micrograms or 25000 IU causes hypervitaminosis means
 A  vitamin toxicity
  • 1 IU 0.03mcg
  • 1mg 1000 mcg
  • 1gram 1000mg
  • 1kg 1000grams
  • 1 Quinta  100kg   
  • 1 ton 100 Quinta


iu (international unit),
mcg (microgram) 
mg (milligram) 
1 gram kg (kilogram).


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

 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

    Animal Sources of Vitamin A
     Serving
    Vitamin A
    (IU)
    %RDA
    Women
    %RDA
    Men
    Polar bear liver
    1 oz
    100,000 IU
    4,330%
    3,330%
    Turkey giblets
    ½ cup
    25,950
    1120%
    865%
    Beef liver
    3 oz
    22,175
    960%
    740%
    Cod liver oil
    1 tsp
    4,500
    200%
    150%
    Chicken liver
    3 oz
    4,255
    185%
    140%
    Braunschweiger (liver sausage)
    2 slices
    7,975
    345%
    265%
    Beef stew, canned
    1 cup
    3,860
    165%
    130%
    Malted drink mix, w/ whole milk
    1 cup
    3,032
    130%
    100%
    Centrum Multi, Original & Silver
    1 tablet
    2,485
    110%
    80%
    Slim Fast
    1 can
    809
    35%
    25%
    Kellogg’s Product 19
    1 cup
    750
    30%
    25%
    Kellogg’s Nutri-Grain Cereal Bar
    1 bar
    750
    30%
    25%
    Fortified breakfast cereals
    1 cup
    500–750
    20–30%
    15-25%
    Ensure
    1 can
    578
    25%
    20%
    Kellogg’s Raisin Bran
    1 cup
    517
    20%
    15%
    Skim milk, added vitamin A
    1 cup
    500
    20%
    15%
    Margarine, added vitamin A
    1 tbsp
    500
    20%
    15%
    Butter
    1 tbsp
    355
    15%
    10%
    Egg
    1 large
    335
    15%
    10%
    Salmon
    3.5 oz
    324
    15%
    10%
    Cheddar cheese
    1 oz
    284
    12%
    9%
    Whole milk
    1 cup
    250
    10%
    8%
    Plant Sources of Vitamin A
    (as carotenoids)
     Serving
    Vitamin A
    (IU)
    %RDA
    Women
    %RDA
    Men
    Sweet potato
    1 med.
    28,058
    1215%
    935%
    Pumpkin, canned
    ½ cup
    19,065
    825%
    635%
    Carrots, cooked
    ½ cup
    13,418
    580%
    445%
    Spinach, cooked
    ½ cup
    11,458
    495%
    380%
    Collards, cooked
    ½ cup
    9,769
    420%
    325%
    Kale, cooked
    ½ cup
    9,558
    415%
    320%
    Turnip greens, cooked
    ½ cup
    8,828
    380%
    290%
    Winter squash
    ½ cup
    5,353
    230%
    175%
    Red peppers, cooked
    ½ cup
    3,738
    160%
    125%
    Cantaloupe
    1 cup
    5,411
    235%
    180%
    Lettuce, Green Leaf
    1 cup
    4,147
    180%
    135%
    Green peas, cooked
    1 cup
    3,360
    145%
    110%
    Apricots, dried
    3
    2,022
    88%
    65%
    Butternut squash, cooked
    1⁄2 cup
    1,900 IU
    80%
    60%
    Broccoli, cooked
    ½ cup
    1,208
    52%
    40%

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

    Vitamin A is found naturally in many foods:

    • cod liver oil (30000 μg)
    • liver (turkey) (8058 μg 895%)
    • liver (beef, pork, fish) (6500 μg 722%)
    • liver (chicken) (3296 μg 366%)
    • dandelion greens (5588 IU 112%)[18]
    • sweet potato (961 μg 107%)
    • carrot (835 μg 93%)
    • broccoli leaf (800 μg 89%) – According to USDA database broccoli florets have much less.[19]
    • broccoli florets (31 μg 3%)
    • butter (684 μg 76%)
    • kale (681 μg 76%)
    • spinach (469 μg 52%)
    • pumpkin (400 μg 41%)
    • collard greens (333 μg 37%)
    • Cheddar cheese (265 μg 29%)
    • cantaloupe melon (169 μg 19%)
    • egg (140 μg 16%)
    • apricot (96 μg 11%)
    • papaya (55 μg 6%)
    • mango (38 μg 4%)
    • pea (38 μg 4%)
    • milk (28 μg 3%)
    • tomatoes
    • Seaweed

    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.