In Vitro Availability of Flavonoids and Other Phenolics in Orange Juice

摘要: Hand-squeezed navel orange juice contains 839 mg/L phenolics, including flavanones, flavones, and hydroxycinnamic acid derivatives. The flavanones are the main phenolics in soluble fraction (648.6 mg/L) also present cloud (104.8 mg/L). During refrigerated storage of fresh (4 degrees C), 50% precipitate integrate into fraction. Commercial juices contain only 81-200 (15-33%) content is higher (206-644 (62-85%), showing that during industrial processing included cloud. An vitro simulation digestion shows a serving (240 mL) provides 9.7 mg hesperidin (4'-methoxy-3',5,7-trihydroxyflavanone-7-rutinoside) 4.7 C-glycosylflavone vicenin 2 (apigenin, 6,8-di-C-glucoside) for freshly squeezed juice, whereas pasteurized commercial provide 3.7 amount (6.3 mg). This means although very rich source limited quantity soluble, this might affect availability absorption (11-36% depending on juice). precipitated not available partly transformed to corresponding chalcones pancreatin-bile digestion.