beta-carotene


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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

A natural red-orange fat-soluble retinoid provitamin metabolised to vitamin A in the body; it is an antioxidant and free-radical scavenger, protecting cells against oxidation damage linked to cancer; it is present in fresh fruits and vegetables, and has immunostimulatory activity; increased BC consumption is associated with a decreased risk of bladder, colon, lung, skin cancer and cancer cell growth in vitro.

Health benefits
Minor protection against heart disease, strokes and effects of ageing.

beta-carotene

precursor of vitamin A, usually ample in a normal diet, which is converted in the body to retinol. This and other carotenoids also function as antioxidants, protecting cells against oxidation damage. Beta-carotene supplements do not appear to have any ergogenic effect. Thus, it is recommended that this pro-vitamin is best obtained through the diet. See also vitamins; appendix 4.2 .

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


β-carotene

References in periodicals archive ?
The beta-carotene content of the sweet potato flour and sweet potato puree was 382.
To assess whether PVA-biofortified crops are likely to have an impact on the VA status of human populations, it is important to know whether the beta-carotene in biofortified crops is bioavailable and converted to VA in the body.
The aim of current study was to observe the intensity of caspase-3, lipid peroxidation Bcl-2 mRNA, and Glutathione, in MDCK cell lysates after the treatment through AFB1 and the protection exerted through beta-carotene.
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.
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.
Not all beta-carotene sources are created equal; many studies support that the intake of fruits and vegetables helps prevent disease.
The vitamin A precursor beta-carotene therefore has an important function in providing for an adequate supply of total vitamin A, international carotenoid experts state in a recently published consensus answer.
The antioxidant is chemically similar to the better known compound beta-carotene and found in similar vegetables, especially carrots, sweet potatoes, broccoli and spinach.
Serum retinol concentrations in children are affected by food sources of beta-carotene, fat intake, and anthelmintic drug treatment.
For that reason we often use mixtures of formulations to obtain a perfect match, for example by combining different ratios of beta-carotene yellow with beta-carotene red.