Orange juice is an important source of flavanones in the Western diet. However, little is known of the variation in flavanone content of shop-bought orange juice with pulp (OJP) or without pulp (OJ), nor the impact of pulp on the fate of flavanones in the gut. Total phenols, total flavonoids, antioxidant capacity, hesperidin and narirutin, and dietary fibre were measured in six orange juice brands sold as OJP and OJ. The inclusion of pulp had little impact on fibre content. Apart from total phenols (OJ: 208.4 ± 10.7 μg gallic acid equivalents (GAE) ml−1; OJP: 225.9 ± 16.7 μg GAE ml−1, P < 0.05), there were no differences between OJ and OJP. The fate of flavanones in OJ and OJP (Tropicana) were further compared using in vitro gastrointestinal (GI) models. After in vitro upper GI digestion, recovery of hesperidin was higher in OJ compared with OJP (89 ± 6 vs. 68 ± 3%, P = 0.033). After 2 h colonic fermentation, hesperidin was 1.2 fold higher in OJP than OJ. However, after 24 h colonic fermentation there was no significant difference between juices in terms of hesperidin, hesperetin, narirutin, naringenin and catabolites. In conclusion, the amount of pulp included in these shop-bought orange juices had little impact on flavanone metabolism in models of the GI tract. The effects of greater amounts of orange pulp remain to be determined.

中文翻译：

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商店购买的橙汁中的果肉对类黄酮含量和肠道细菌体外降解黄烷酮的影响很小

橙汁是西方饮食中黄烷酮的重要来源。然而，对于商店购买的有果肉 (OJP) 或无果肉 (OJ) 橙汁的黄烷酮含量的变化，以及果肉对肠道中黄烷酮命运的影响知之甚少。在以 OJP 和 OJ 出售的六个橙汁品牌中，测量了总酚、总黄酮、抗氧化能力、橙皮苷和橙皮苷以及膳食纤维。加入纸浆对纤维含量几乎没有影响。除了总酚（OJ：208.4 ± 10.7 μg 没食子酸当量 (GAE) ml-1；OJP：225.9 ± 16.7 μg GAE ml-1，P < 0.05），OJ 和 OJP 之间没有差异。使用体外胃肠 (GI) 模型进一步比较了 OJ 和 OJP (Tropicana) 中黄烷酮的命运。体外上消化道消化后，橙皮苷的回收率在 OJ 中高于 OJP（89 ± 6 对 68 ± 3%，P = 0.033）。2 小时结肠发酵后，橙皮苷在 OJP 中比 OJ 高 1.2 倍。然而，经过 24 小时结肠发酵后，果汁之间在橙皮苷、橙皮素、橙皮苷、柚皮素和分解代谢物方面没有显着差异。总之，这些商店购买的橙汁中包含的果肉量对胃肠道模型中的黄烷酮代谢几乎没有影响。大量橙肉的影响仍有待确定。这些商店购买的橙汁中的果肉量对胃肠道模型中的黄烷酮代谢几乎没有影响。大量橙肉的影响仍有待确定。这些商店购买的橙汁中的果肉量对胃肠道模型中的黄烷酮代谢几乎没有影响。大量橙肉的影响仍有待确定。