Kiwifruit dietary fiber consists of cell-wall polysaccharides that are typical of the cell walls of many dicotyledonous fruits, being composed of pectic polysaccharides, hemicelluloses, and cellulose. The kiwifruit pectic polysaccharides consist of homo- and rhamnogalacturonans with various neutral, (arabino)-galactan side chains, while the hemicelluloses are mostly xyloglucan and xylan. The proportions of pectic polysaccharide, hemicellulose, and cellulose in both green ‘Hayward’ and ‘Zespri® Gold’ are similar and are little affected by in vitro exposure to gastric and small intestinal digestion. The hydration properties of the kiwifruit—swelling and water retention capacity—are also unaffected by foregut digestion, indicating that the functional properties of kiwifruit fiber survive in the foregut. However, in the hindgut, kiwifruit fiber is fermented, but whole kiwifruit consumed in association with slowly fermented fiber leads to distal displacement of fermentation, indicating that hindgut benefits of kiwifruit may result from its interaction with other dietary sources of fiber.
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猕猴桃膳食纤维由细胞壁多糖组成，是许多双子叶植物果实细胞壁的典型组成部分，由果胶多糖、半纤维素和纤维素组成。猕猴桃果胶多糖由具有各种中性、（阿拉伯）半乳聚糖侧链的高糖和鼠李糖乳糖醛酸组成，而半纤维素主要是木聚糖和木聚糖。绿色“Hayward”和“Zespri®Gold”中果胶多糖、半纤维素和纤维素的比例相似，受体外暴露于胃和小肠消化的影响很小。猕猴桃的水化特性膨胀和保水能力也不受前肠消化的影响，表明猕猴桃纤维的功能特性在前肠中存活。然而，在后肠中，猕猴桃纤维是发酵的，但与缓慢发酵的纤维一起食用的整个猕猴桃会导致发酵的远端移位，这表明猕猴桃的后肠益处可能来自其与其他膳食纤维来源的相互作用。
猕猴桃膳食纤维对肠胃的影响
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