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beta-carotene

   Also found in: Dictionary/thesaurus, Encyclopedia, Wikipedia, Hutchinson 0.01 sec.
beta-carotene
n.
A phytonutrient that is an isomer of carotene found in dark green and yellow fruits and vegetables and that is converted to vitamin A, primarily in the liver.
beta-carotene
Etymology: Gk, beta; L, carota, carrot
a vitamin A precursor and ultraviolet screening agent.
indication It is prescribed to ameliorate photosensitivity in patients with erythropoietic protoporphyria.
contraindications It is used with caution in patients with impaired renal or hepatic function. Known hypersensitivity to this drug prohibits its use.
adverse effects No serious adverse reactions have been observed. Diarrhea may occur.
beta-carotene (bā·t·ke·rō·tēn),
n a plant pigment, antioxidant, and biochemical precursor to vitamin A. Large doses may increase the risk of lung cancer and cardiac disease.
beta-carotene
see carotene.
β-carotene
see carotene.
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But the Newcastle University team, led by Dr Georg Lietz has shown almost 50% of women have a genetic variation which reduces their ability to produce sufficient amounts of vitamin A from beta-carotene - which is present in many fruits, grains, oils, and vegetables.
Genetic variation is to blame for colds; Some women suffer Vitamin A ... by The Journal (Newcastle, England)
But the Newcastle University team, led by Dr Georg Lietz, has shown almost 50% of women have a genetic variation which reduces their ability to produce sufficient amounts of vitamin A from beta-carotene - which is present in many fruits, grains, oils, and vegetables.
Half of women lack vitamin A by Evening Chronicle (Newcastle, England)
ISLAMABAD, May 15, 2009 (Balochistan Times) -- Beta-carotene in so-called Golden Rice converts to vitamin A in humans, according to researchers.
Golden rice an effective source of vitamin A by Balochistan Times (Baluchistan Province, Pakistan)
 
 
 
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