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Is beta-carotene an antioxidant? - PubMed An hypothesis is presented that is opposed to the conventional viewpoint that beta-carotene is an in vivo free-radical scavenger. It is suggested that there are biochemical reasons why beta-carotene

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Is beta-carotene an antioxidant? - PubMed

An hypothesis is presented that is opposed to the conventional viewpoint that beta-carotene is an in vivo free-radical scavenger. It is suggested that there are biochemical reasons why beta-carotene, other carotenoids, and especially their metabolites may be harmful to mammalian systems. Finally, th …

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Beta-carotene and other carotenoids as antioxidants

Beta-carotene and others carotenoids have antioxidant properties in vitro and in animal models. Mixtures of carotenoids or associations with others antioxidants (e.g. vitamin E) can increase their activity against free radicals. The use of animals models for studying carotenoids is limited since most of the animals do not absorb or metabolize ...

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Beta Carotene | Antioxidants.org

Antioxidant Benefits of Beta Carotene. The appeal of a deeply orange carrot does not stop at the eyes. Foods that are high in beta carotene are now being linked to lowered levels of cancer, as well as reduced risks for heart disease. Fruits and vegetables with a rich yellow or orange color are most likely to be high in this substance.

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Beta-carotene as antioxidant - PubMed

Objective: Beta-carotene has been shown to exhibit a good radical-trapping antioxidant activity in vitro. We were interested to see if dietary beta-carotene in combination with various intake levels for vitamin A would also inhibit lipid peroxidation.

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beta-Carotene: an unusual type of lipid antioxidant

The mechanism of lipid peroxidation and the manner in which antioxidants function is reviewed. beta-Carotene is a purported anticancer agent, which is believed by some to have antioxidant action of a radical-trapping type. However, definitive experimental support for such action has been lacking. Ne …

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Beta carotene. Carotenoids. Antioxidants - Doctors Lounge(TM)

Beta-carotene is the most widely studied. It is composed of two molecules of vitamin A (retinol) joined together. Dietary beta-carotene is converted to retinol at the level of the intestinal mucosa. Mechanisms of Action: The antioxidant function of beta-carotene is due to its ability to quench singlet oxygen, scavenge free radicals and protect ...

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Antioxidants, Vitamin E, Beta Carotene & Cardiovascular ...

The doses of vitamin E ranged from 50-800 international units (IU); for beta carotene, the doses were 15-50 milligrams (mg). Overall, 81,788 patients were included in the vitamin E portion of the meta-analysis and 138,113 in the beta carotene portion. The CCF researchers looked for the effect of antioxidant vitamins on death rates, either from ...

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[Carotenoids as natural antioxidants]

Comparing β-carotene, astaxanthin and lycopene with other antioxidants (e.g. vitamin C and E), it can be concluded that these compounds have higher antioxidant activity, e.g. against singlet oxygen. Astaxanthin is a stronger antioxidant compared to β-carotene, vitamin E and vitamin C, respectively 54, 14 and 65 times.

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Antioxidant Activity of β-Carotene Compounds in Different ...

β-cryptoxanthin, α-carotene, lycopene, lutein and zeaxanthin) account for more than 95% of total blood carotenoids. β-Carotene (BC) is a naturally occurring orange-colored carbon-hydrogen carotenoid, abundant in yellow-orange fruits and vegetables and in dark green, leafy vegetables [2].

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Antioxidant activities, phenolic and β-carotene contents ...

For β-carotene, the orange-fleshed clones had the highest content among the samples analysed. Hernandez and clone 11-20, which are both dark orange-coloured, had the highest β-carotene content, with 167 and 226 μg/g fw, respectively . Therefore, the high antioxidant activities of clone 11-20 can be attributed to its phenolic and β-carotene ...

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Beta carotene. Carotenoids. Antioxidants - Doctors Lounge(TM)

Beta-carotene is the most widely studied. It is composed of two molecules of vitamin A (retinol) joined together. Dietary beta-carotene is converted to retinol at the level of the intestinal mucosa. Mechanisms of Action: The antioxidant function of beta-carotene is due to its ability to quench singlet oxygen, scavenge free radicals and protect ...

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beta-Carotene, Antioxidant (CAS 7235-40-7) (ab142849) | Abcam

Chemical Structure - beta-Carotene, Antioxidant (ab142849) 2D chemical structure image of ab142849, beta-Carotene, Antioxidant. Protocols. To our knowledge, customised protocols are not required for this product. Please try the standard protocols listed below and let us know how you get on. ...

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The Beta Carotene Molecule Antioxidant Properties

Biologically, beta-carotene is most important as the precursor of vitamin A. It also has antioxidant properties and may help in preventing cancer and other diseases although much controversy continues in this area (see below). Carotene plays a crucial role as a photosynthetic pigment, important for photosynthesis. .

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Antioxidants, Vitamin E, Beta Carotene & Cardiovascular ...

The doses of vitamin E ranged from 50-800 international units (IU); for beta carotene, the doses were 15-50 milligrams (mg). Overall, 81,788 patients were included in the vitamin E portion of the meta-analysis and 138,113 in the beta carotene portion. The CCF researchers looked for the effect of antioxidant vitamins on death rates, either from ...

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Characterization and antioxidant activity of β-carotene ...

β-Carotene (β-C) is a well-established natural antioxidant agent, but its poor water-solubility, low chemical stability and low bioavailability limit its application in food, pharmaceuticals and cosmetics industries. Thus it is critical to develop an efficient method to improve the water solubility and stability of β-C.

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Emerging role of beta-carotene and antioxidant nutrients ...

beta-carotene and other antioxidant nutrients, such as vitamin E, are well suited for widespread preventive use because they are nontoxic and easily given in supplement form. Intervention trials designed to show a reduction of cancer incidence in the general population are logistically and practically impossible for most types of cancer ...

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(PDF) Antioxidant Activity of β-Carotene Compounds in ...

β-Carotene (BC) is the most abundant carotenoid in human diet, almost solely as (all-E)-isomer. Significant amounts of (Z)-isomers of BC are present in processed food as well as in mammalian tissues.

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Antioxidant properties of β-carotene isomers and their ...

Antioxidant properties of β-carotene isomers and their role in photosystems: insights from Ab initio simulations. Cerezo J(1), Zúñiga J, Bastida A, Requena A, Cerón-Carrasco JP, Eriksson LA. Author information: (1)Departamento de Química Física, Universidad de Murcia, Spain. [email protected]

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Quantitative assessment of antioxidant properties of ...

The remarkable role of β-carotene as an ‘unusual antioxidant’ (Burton GW and Ingold KU, Science 224: 569–573 (1984)) in reactions using various oxygen pressures becomes clearer. The so-called ‘pro-oxidant effects’ concern primarily the antioxidant itself and its degradation, since no or very little damage to the substrate occurs in ...

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The shifting perception on antioxidants: The case of ...

The dilemma remains: what are antioxidants in the end, toxic or healthy? We evaluated this dilemma by examining the presumed health effects of two individual natural antioxidants in which the opposite images are materialized i.e. the “poisonous” β-carotene and the “healthy” vitamin E , , , , .The interaction of β-carotene and vitamin E with physiological systems should be evaluated ...

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Beta-carotene as antioxidant. - Abstract - Europe PMC

Abstract. OBJECTIVE: Beta-carotene has been shown to exhibit a good radical-trapping antioxidant activity in vitro. We were interested to see if dietary beta-carotene in combination with various intake levels for vitamin A would also inhibit lipid peroxidation. DESIGN: Sixty male Wistar rats received vitamin A (as retinyl palmitate) for 14 ...

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The Beta Carotene Molecule Antioxidant Properties

Biologically, beta-carotene is most important as the precursor of vitamin A. It also has antioxidant properties and may help in preventing cancer and other diseases although much controversy continues in this area (see below). Carotene plays a crucial role as a photosynthetic pigment, important for photosynthesis. .

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Beta-Carotene: The world’s healthiest antioxidant

Beta-carotene is an antioxidant. Like all carotenoids, beta-carotene is an antioxidant. An antioxidant is an element that prevents the oxidation of other molecules. It also protects our bodies from free-radicals that damage our cells during oxidation. If these damages are prolonged, the can cause some serious chronic illnesses.

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Antiapoptotic and antioxidant effects of beta-carotene ...

Antiapoptotic and antioxidant effects of beta-carotene against methotrexate-induced testicular injury. Vardi N(1), Parlakpinar H, Ates B, Cetin A, Otlu A. Author information: (1)Department of Embryology and Histology, Faculty of Medicine, Inonu University, Malatya, Turkey. [email protected]

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(PDF) Antioxidant Role of Beta Carotene: Protection ...

Antioxidant Role of Beta Carotene: Protection against Cadmium Induced T esticular T oxicity. Pharmacog J. 20 18;10(6)Suppl:s66-s70. toli cells. is metal can reduce tes toster one syn the-

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Nanodispersions of beta-carotene: effects on antioxidant ...

Beta-carotene is a carotenoid precursor of vitamin A, known for its biological activities. Due to its high hydrophobicity, nanonization processes, i.e. the transformation into nanoparticles, can improve its water affinity, and therefore the activity in aqueous systems. The objective of this study was to produce beta-carotene nanoparticles by the solid dispersion method and to evaluate their ...

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Influence of interfacial characteristics and antioxidant ...

The ability of antioxidants to inhibit β-carotene degradation was affected by surfactant blending, regardless of the antioxidant polarity. Contrary to the expectation that lauryl gallate would show a better antioxidant ability than TBHQ because of its physical location in the interfacial region, TBHQ was generally more effective in inhibiting ...

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Antioxidants | Free Full-Text | A Mechanistic Review of β ...

Carotenoids are natural lipid-soluble antioxidants abundantly found as colorful pigments in fruits and vegetables. At least 600 carotenoids occur naturally, although about 20 of them, including β-carotene, α-carotene, lycopene, lutein, zeaxanthin, meso-zeaxanthin, and cryptoxanthin, are detectable in the human blood. They have distinct physiological and pathophysiological functions ranging ...

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Beta-carotene reduces oxidative stress, improves ...

In contrast, the antioxidant properties of beta-carotene are well documented. Beta-carotene is able not only to quench singlet oxygen but also to neutralize lipid peroxyl radicals (Mortensen et al., 2001, Rodrigues et al., 2012). We observed that beta-carotene treatment reduced the levels of almost all the measured oxidative stress biomarkers.

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Antioxidant assay using Linoleic beta Carotene methods?

Hello everyone. Please i need an explaination on antioxidant assay using Beta carotene. Preferably Miller, 1971 method. Publication on this will be appreciated.

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