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Vitamin A
Supplements & Information
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Vitamin A is a fat soluble vitamin that promotes
good vision, especially night vision, and helps maintain healthy skin,
mucous membranes, teeth, and bones. It also helps regulate the immune
system which, in addition to healthy skin and mucous membranes, can
aid the body in preventing or fighting off disease and viruses.
Vitamin A, also known as retinol,
is essential to the formation of visual purple in the retina, which
allows vision in dim light.
Beta carotene,
the precursor to vitamin A found in vegetables, has antioxidant properties,
which means it protects cells from the daily toxic damage of oxidation.
Vitamin A helps form and
maintain healthy teeth, skeletal and soft tissue, mucous membranes,
and skin. It is also known as retinol because it generates the pigments
in the retina. Vitamin A promotes good vision, especially in dim
light. It may also be required for reproduction and breast-feeding.
Read
more below...
Purchase Online
You can get Vitamin A Supplements online
at stores below:
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Drugstore.com
The home of the GNC Store. They also teamed up with other great suppliers to bring you a broad selection of vitamins, private label vitamins & herbs, herbal supplements & minerals, body building & dietary supplements, and more at everyday low prices.
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The
Vitamin Shoppe
Americas Health
Superstore and leading value price retailer of vitamins, supplements, and
everything else for good health and nutrition. Over 25,000 products from more
than 400 national brands at the lowest possible value price every day.
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MotherNature.com
Great selections of quality, all-natural products for a healthy lifestyle, including vitamins and minerals, supplements, herbs, and more.
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Puritan's Pride
Puritan's Pride
manufactures over 1,000 high quality vitamins, minerals, herbs and other
nutritional supplements in their own state-of-the-art facilities and produces
supplements in every available form, including tablets, two-piece capsules,
softgels, powders and liquids.
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WebVitamins.com
Offers one of the largest selections of the finest vitamins, herbs and minerals brands available anywhere. They make their marketing and purchasing decisions to maintain their products the lowest prices in the industry.
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Beta-carotene,
which has antioxidant properties, is a precursor to Vitamin A. Antioxidants
quench free radicals, which are unstable substances that can react with and
damage cells, tissues and organs. Free radicals are believed to be associated
with many of the degenerative changes seen with aging. However, it is not
yet known whether antioxidants can prevent these changes and studies have
been conflicting. For example, one study found increased cancer risk in smokers
who took high doses of beta carotene. With Vitamin A, as with many other
vitamins, a certain amount is necessary, but too much is toxic.
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Food Sources
Vitamin A comes
from animal sources, such as eggs, meat, milk, cheese, cream, liver, kidney,
cod and halibut fish oil. However, all of these sources -- except for skim
milk that has been fortified with Vitamin A -- are high in saturated fat and
cholesterol.
The precursor
form, beta-carotene, is found in plants. Sources of beta-carotene are carrots,
pumpkin, sweet potatoes, winter squashes, cantaloupe, pink grapefruit, apricots,
broccoli, spinach, and most dark green, leafy vegetables. The more intense
the color of a fruit or vegetable, the higher the beta-carotene content. These
vegetable sources of beta-carotene are free of fat and cholesterol.
The body regulates the conversion of beta-carotene to Vitamin A based on its
needs.
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Side Effects
If you don't
get enough Vitamin A, you are more susceptible to infectious diseases and
vision problems. However, large doses of Vitamin A can be toxic. Large doses
can also cause abnormal fetal development in pregnant women.
Increased amounts
of beta-carotene can turn the color of skin to yellow or orange. The skin
color returns to normal once the increased intake of beta-carotene is reduced.
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Recommendations
The best way
to get the daily requirement of essential vitamins is to eat a balanced diet
that contains a variety of foods from the food guide pyramid.
The FDA's
reference daily intakes
(RDI) for Vitamin A is 5,000 International Units (IU).
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Information on this site is provided for informational
purposes and is not meant to substitute for the advice provided by your own
physician or other medical profession. You should not use the information
contained herein for diagnosing or treating a problem or disease, or prescribing
any medication. If you have or suspect that you have a medical problem, promptly
contact your health care provider. Information and statements regarding
dietary supplements have not been evaluated by the Food and Drug Administration
and are not intended to diagnose, treat, cure, or prevent any disease.
Please review the
Terms of Use
before using this site. Your use of the site indicates your agreement
to be bound by the Terms of Use.
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