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Título: | In Vitro Availability of Flavonoids and Other Phenolics in Orange Juice |
Autor: | Tomás Barberán, Francisco CSIC ORCID ; Gil Muñoz, M.ª Isabel; Gil-Izquierdo, Ángel CSIC ORCID; Ferreres, Federico CSIC ORCID | Palabras clave: | Orange juice Flavonoids Processing Flavanones Flavonols Caffeic acid derivatives Availability Solubility |
Fecha de publicación: | 26-ene-2001 | Editor: | American Chemical Society | Citación: | Journal of Agricultural and Food Chemistry 49(2): 1035-1041 (2001) | Resumen: | Hand-squeezed navel orange juice contains 839 mg/L phenolics, including flavanones, flavones, and hydroxycinnamic acid derivatives. The flavanones are the main phenolics in the soluble fraction (648.6 mg/L) and are also present in the cloud fraction (104.8 mg/L). During refrigerated storage of fresh juice (4 °C), 50% of the soluble flavanones precipitate and integrate into the cloud fraction. Commercial orange juices contain only 81−200 mg/L soluble flavanones (15−33%) and the content in the cloud is higher (206−644 mg/L) (62−85%), showing that during industrial processing and storage the soluble flavanones precipitate and are included in the cloud. An in vitro simulation of orange juice digestion shows that a serving of fresh orange juice (240 mL) provides 9.7 mg of soluble hesperidin (4‘-methoxy-3‘,5,7-trihydroxyflavanone-7-rutinoside) and 4.7 mg of the C-glycosylflavone vicenin 2 (apigenin, 6,8-di-C-glucoside) for freshly squeezed orange juice, whereas pasteurized commercial juices provide 3.7 mg of soluble hesperidin and a higher amount of vicenin 2 (6.3 mg). This means that although orange juice is a very rich source of flavanones, only a limited quantity is soluble, and this might affect availability for absorption (11−36% of the soluble flavanones, depending on the juice). The flavanones precipitated in the cloud are not available for absorption and are partly transformed to the corresponding chalcones during the pancreatin−bile digestion. | Descripción: | 7 pages, 1 figure, 5 tables. | Versión del editor: | http://dx.doi.org/10.1021/jf0000528 | URI: | http://hdl.handle.net/10261/18096 | DOI: | 10.1021/jf0000528 | ISSN: | 0021-8561 | E-ISSN: | 1520-5118 |
Aparece en las colecciones: | (CEBAS) Artículos |
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