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About Vitamins |
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| Beta-Carotene: Best Food Sources -- Dark Green vegetables, carrots and
tomatoes. Note: Beta-Carotene natural form is comprised of two molecules. The
synthetic form of Beta Carotene only has one molecule. Therefore, natural food sources are best.
The term carotene is used for several related substances
having the formula C40H56. Carotene is an orange photosynthetic pigment
important for photosynthesis. It is responsible for the orange colour of the
carrot and many other fruits and vegetables. It contributes to
photosynthesis by transmitting the light energy it absorbs to chlorophyll.
Chemically, carotene is a terpene, synthesized biochemically from eight
isoprene units. It comes in two primary forms designated by characters from
the Greek alphabet: alpha-carotene (α-carotene) and beta-carotene
(β-carotene). Gamma, delta and epsilon (γ, δ and ε-carotene) also exist.
Beta-carotene is composed of two retinyl groups, and is broken down in the
mucosa of the small intestine by beta-carotene dioxygenase to retinol, a
form of vitamin A. Carotene can be stored in the liver and converted to
vitamin A as needed, thus making it a provitamin.
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More
Beta Carotene best food source
resources
- Vitaminfo.com
- Has facts about vitamins and minerals including omega-3, beta-carotene,
and lutein. Also gives tips for balanced eating and living.
-- http://www.nutrivit.co.uk
Health: Nutrition: Nutrients: Vitamins and Minerals
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Grains of Delusion: Golden Rice Seen from the Ground
- A discussion of who benefits from the genetic modification of rice to
produce beta-carotene.
-- http://www.grain.org/publications/delusion-en.cfm
Science: Agriculture: Field Crops: Cereals: Rice
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Ask the Mayo Dietitian - Vitamin A and beta carotene
- [CNN]
-- http://www.cnn.com/2000/HEALTH/mayo/08/30/vitamina.betacarotene/
News: Online Archives: CNN.com: 2000: August: Health
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Beta Carotene best food source
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Beta Carotene best food source
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