Vitamin A as natural beta-carotene
Beta-carotene is also known as provitamin A, which
means it is a precursor, or parent molecule for this important
vitamin. The breakdown of beta-carotene takes place in the
small intestine, where it is converted into the retinol form
of vitamin A, which is then stored in the liver as retinyl
esters.
Beta-carotene can be found in abundance in carrots, spinach,
winter squash, cantaloupe, broccoli, sweet potatoes, oranges,
lettuce, tomatoes and other richly colored, yellow, orange
and green leafy fruits and vegetables. Beta-carotene is one
of the pigments that give fruits and vegetables their deep
red, orange and yellow coloration. The greater the intensity
of the color, the more beta-carotene is contained within.
Vitamin A deficiency can lead to eye problems, dry skin and
hair, insomnia and fatigue.
Health benefits of vitamin A
- Helps maintain good vision and prevents night blindness
- Promotes the growth of cells and tissues
- Helps the body resist infection
- A great antioxidant and may reduce the risk of certain
cancer
- Promotes healthy skin
- Assists in the immune system
- Required for development and maintenance of the epithelial
cells in the mucous membranes and skin
Recommendations
RDI/AI – 5000 IU per day
UL – 15,000* IU per day
* Taking more than 10,000 IU of vitamin A per day may cause
birth defects.
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Principal Author: M. Ofiyeva
Date of Initial Publication: 09/07/2007
Article Last Updated: 08/26/2009
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