粗纤维主要存于植物性食品中,如粮食制品、果实、蔬菜等.粗纤维与淀粉、糖类虽都属于碳水化合物,但粗纤维比其它碳水化合物更为复杂.粗纤维是一些化合物的总称,主要包括纤维素、半纤维素、果胶、木质素等.它们是组成植物细胞壁的主要成分.从营养的角度来看,由于人体消化器官中不存在水解粗纤维的各种酶,所以它不能被人体消化吸收,从而就谈不上有什么营养价值.相反,由于它的含量较 Crude fiber is mainly stored in plant foods, such as food products, fruits, vegetables, etc. Although crude fiber and starch, carbohydrates are all carbohydrates, but the crude fiber is more complex than other carbohydrates.Crude fiber is a general term for some compounds , Mainly including cellulose, hemicellulose, pectin, lignin, etc. They are the main components that make up the plant cell wall. From the nutritional point of view, since there are no various enzymes that hydrolyze crude fiber in human digestive organs, Can not be digested by the body, so there is no nutritional value on the contrary, because of its content than