cryptoxanthin/spinacia oleracea

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No influence of supplemental dietary calcium intake on the bioavailability of spinach carotenoids in humans.

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Dietary carotenoid intake, especially from fruits and vegetables, has been associated with a reduced incidence of several chronic diseases. However, its bioavailability can vary, depending on the food matrix and host factors. Recently, it has been suggested that divalent minerals negatively impinge

Assessment of dietary vitamin A intake (retinol, α-carotene, β-carotene, β-cryptoxanthin) and its sources in the National Survey of Dietary Intake in Spain (2009-2010).

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The aim of this study is to assess the intake of the individual components of vitamin A and major dietary sources in the Spaniards using data on food consumption from Spanish National Dietary Intake Survey (2009-2010). A 24-h dietary recall, 3-day diet diary and a software application that includes

Dietary β-Cryptoxanthin and α-Carotene Have Greater Apparent Bioavailability Than β-Carotene in Subjects from Countries with Different Dietary Patterns

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β-carotene, α-carotene and β-cryptoxanthin are greater contributors to vitamin A intake than retinol in the human diet for most people around the world. Their contribution depends on several factors, including bioavailability and capacity of conversion into retinol. There is an increasing body of

A prospective study of carotenoid and vitamin A intakes and risk of cataract extraction in US women.

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BACKGROUND Oxidation of lens proteins plays a central role in the formation of age-related cataracts, suggesting that dietary antioxidants may play a role in prevention. However, the relation between specific antioxidants and risk of cataract remains uncertain. OBJECTIVE Our objective was to examine

Intake of vitamin A and carotenoids from the Italian population--results of an Italian total diet study.

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The present study focused on vitamin A and carotenoids (alpha-and beta-carotene, lutein and zeaxanthin, beta-cryptoxanthin, lycopene) daily intake from the Italian total diet. The input of some food groups (cereals, vegetables, fruits, milk and dairy, meat and meat products, fish) most responsible

Development and evaluation of a new method for the determination of the carotenoid content in selected vegetables by HPLC and HPLC-MS-MS.

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Epidemologic studies have shown inverse correlation between the consumption of carotenoid-rich vegetables and the incidence of cancer. Therefore, analytical techniques for the quantitative determination of carotenoids in complex sample matrices are important. The most used method is reversed-phase

Carotenoid micellarization varies greatly between individual and mixed vegetables with or without the addition of fat or fiber.

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Carotenoid bioavailability is influenced by a number of factors, including the type of food matrix and the presence of fat, fiber, and other carotenoids. Therefore, the objectives of the present study were: first, to assess the effects of mixing raw vegetables on the micellarization of

Quantification of Provitamin A Compounds in ChInese Vegetables by High-Performance Liquid Chromatography.

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The provitamin A contents of 16 vegetables grown in Taiwan were analyzed by high-performance liquid chromatography with photodiode-array detection. The amounts of the major provitamin A compounds, (β-cryptoxanthin, α-carotene, and β-carotene ranged from 0-6.8, 0-27.7, and 0.6-104.9 (μg/g,

[Effect of green and yellow vegetables on serum carotenoid in children].

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OBJECTIVE To assay the effect of green and yellow vegetables on serum carotenoid concentration and its relation to serum retinol level in children. METHODS A ten-week green and yellow vegetable intervention study was conducted in children aged 5.3 to 6.4 years of two classes in a kindergarten in

Dietary intake of carotenoid isomers in Israel.

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Controversy exists regarding the possible protective role of carotenoids against cancer. Evidence is mainly against all-E-beta-carotene, while there is no evidence against other carotenoids or against mixtures of beta-carotene stereoisomers. Carotenoid isomers could account for the variability in

Structural and geometrical isomers of carotenoids in human plasma.

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We have quantitatively analyzed human plasma for the following carotenoids: all-trans-lutein, all-trans-zeaxanthin, alpha-cryptoxanthin, beta-cryptoxanthin, the sum of all-trans-lycopene and its cis isomers, alpha-carotene and beta-carotene. In addition, we have tentatively identified and quantified

[Daily intake of carotenoids (carotenes and xanthophylls) from total diet and the carotenoid content of selected vegetables and fuit].

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The recommended daily intake is currently either 2 mg of beta-carotene (recommended by DGE, Germany, in addition to 1.0 (0.8) mg retinol-equivalents for vitamin A requirement) or 5-6 mg of beta-carotene (recommended by NCI, USA). The present studies were carried out to investigate to what extent a

[Carotenoid intake in the German National Food Consumption Survey].

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In nutritional epidemiological studies high consumption of fruits and vegetables was shown to be an important preventive measure to reduce the risk of cancer, coronary heart disease, and cataracts. These effects cannot be explained completely and in a sufficient way by the intake of beta-carotene

Do dietary lycopene and other carotenoids protect against prostate cancer?

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To determine whether dietary intake of lycopene and other carotenoids has an etiological association with prostate cancer, a case-control study was conducted in Hangzhou, southeast China during 2001-2002. The cases were 130 incident patients with histologically confirmed adenocarcinoma of the

Rapid electrochemical method for the evaluation of the antioxidant power of some lipophilic food extracts.

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In this paper, a novel electrochemical method to evaluate the antioxidant power of lipophilic compounds present in vegetables, such as carotenoids, chlorophylls, tocopherols, and capsaicin, is reported. The method is based on a flow injection system with an electrochemical detector equipped with a

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