Changes in fecal bulk and bacterial abundance due to separately consumed skin and flesh of four kiwifruit cultivars was determined using a rat model designed to estimate the fecal bulking potential of human foods. Dry matter contribution by skin to 100 g of fresh kiwifruit was less than 5% in all cultivars, whereas flesh dry matter contributed up to 20% of fresh fruit weight. Dietary fiber was 35–49% of skin compared with 8–23% of flesh on a dry weight basis. The skin significantly increased whole fruit fecal bulking, but the total bulk per 100 g kiwifruit was less than 10% of daily fecal bulk recommended for optimal gut health. Kiwifruit (skin or flesh) substantially increased the abundance of Lachnospiraceae and Lactobacillus spp. within the gut. Fermentation and prebiosis therefore probably play a greater role than fermentation-resistant dietary fiber in gut health benefits of kiwifruit.

中文翻译：

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猕猴桃皮和肉对大鼠粪便膨胀和细菌丰度的贡献

使用旨在评估人类食物粪便膨胀潜力的大鼠模型，确定了由于分别食用四种猕猴桃品种的皮肤和果肉而导致的粪便体积和细菌丰度的变化。在所有品种中，表皮对 100 克新鲜猕猴桃的干物质贡献不到 5%，而果肉干物质对新鲜水果重量的贡献高达 20%。按干重计算，膳食纤维占皮肤的 35-49%，而占肉的 8-23%。果皮显着增加了整个水果的粪便体积，但每 100 克猕猴桃的总体积小于为实现最佳肠道健康而推荐的每日粪便体积的 10%。猕猴桃（皮肤或果肉）显着增加了毛螺菌科和乳杆菌属的丰度。肠道内。