beta-carotene


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beta-carotene:

see carotenecarotene
, long-chained, unsaturated hydrocarbon found as a pigment in many higher plants, particularly carrots, sweet potatoes, and leafy vegetables. Carotene is thought to assist in trapping light energy for photosynthesis or to aid in chemical reduction.
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; antioxidantantioxidant,
substance that prevents or slows the breakdown of another substance by oxygen. Synthetic and natural antioxidants are used to slow the deterioration of gasoline and rubber, and such antioxidants as vitamin C (ascorbic acid), butylated hydroxytoluene (BHT), and
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; Vitamin A under vitaminvitamin,
group of organic substances that are required in the diet of humans and animals for normal growth, maintenance of life, and normal reproduction. Vitamins act as catalysts; very often either the vitamins themselves are coenzymes, or they form integral parts of coenzymes.
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References in periodicals archive ?
Beta-carotene antioxidant use during radiation therapy and prostate cancer outcome in the Physicians' Health Study.
Yet many AREDS supplements still have EPA, DHA, beta-carotene, and high doses of zinc.
Table 56: World Historic Review for Beta-Carotene by
The team found that orange-fleshed honeydew had significantly higher beta-carotene concentrations than cantaloupe, but the two melon types had similar beta-carotene bioaccessibilities.
FLEXNEWS] What are the European Food Safety Agency's opinions on BASF's beta-carotene and lycopene?
What our research shows is many women are simply not getting enough of this vital nutrient because their bodies are not able to convert the beta-carotene.
BMD in the hips of men was also associated with intakes of total carotenoids, beta-carotene, and lutein plus zeaxanthin.
Beta-carotene also helps fend off a range of cancers including those affecting the lung, oesophagus, larynx, cervix, colon and prostate gland.
The gene, which allows vegetables to store beta-carotene, was only recently isolated by Cornell scientists after they analysed the genetic mutation that produces orange cauliflowers.
At higher oxygen pressures [as occur in the lung], beta-carotene loses its antioxidant activity and shows an autocatalytic, pro-oxidant effect, particularly at relatively high concentrations.
They contain the substance beta-carotene - which your body converts into vitamin A, which in turn improves your night vision.
The company has shown that boiled carrots promote the absorption of beta-carotene in the body.