The human intestinal contains rich and diverse microbiota that utilizes a variety of polysaccharides. The intestinal microflora extends the metabolic functions of the body, obtaining energy from indigestible dietary polysaccharides. It is not only a highly competitive environment but also a comprehensive collaboration for these polysaccharides, as the microbiota work to maximize the energy harvested from them through the intestine. Indigestible dietary polysaccharides help to manage colon health and host health by affecting the gut microbial population. These polysaccharides also influence the metabolic activity of the intestinal microbiota by stimulating the formation of SCFAs. Most of these metabolic activities affect host physiology because the epithelium absorbs secondary metabolites and end products or transports them to the liver, where they could exert other beneficial effects. This article reviews the carbohydrates existing in the human intestine, the regulating actions of indigestible polysaccharides on intestinal microflora, and the molecular basis of the degradation process of these polysaccharides.

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不可消化的饮食多糖对肠道菌群的调节作用：概述

人的肠道包含利用多种多糖的丰富多样的微生物群。肠道菌群扩展了人体的代谢功能，从不可消化的饮食多糖中获取能量。这些微生物不仅能在竞争激烈的环境中发挥作用，而且也能为这些多糖提供全面的合作，因为微生物群会努力最大限度地通过肠道从它们中收集能量。不可消化的饮食多糖通过影响肠道微生物数量，帮助管理结肠健康和宿主健康。这些多糖还通过刺激SCFA的形成来影响肠道菌群的代谢活性。这些代谢活动中的大多数会影响宿主生理，因为上皮会吸收次级代谢产物和终产物或将其运输到肝脏，他们可以发挥其他有益作用。本文综述了人体肠道中存在的碳水化合物，难消化多糖对肠道菌群的调节作用以及这些多糖降解过程的分子基础。