人类膳食中出现的食物纤维来自蔬菜、水果和粮食。食物纤维主要包括纤维素、半纤维素、木质素和果胶等不能为人体消化酶水解的部分。过去认为,食物在消化过程中分解为营养和废渣两部分,前者被机体吸收,后者则排出体外。食物纤维属于废渣之列,被误认为对机体是无益的。随着科学事业的发展,20世纪中叶开始,逐渐出现了食物纤维在消化 The dietary fiber appearing in the human diet comes from vegetables, fruits and grains. Food fibers mainly include cellulose, hemicellulose, lignin and pectin and other parts of the human digestive enzymes can not be hydrolyzed. In the past that the food in the digestive process is decomposed into two parts of nutrition and waste, the former is absorbed by the body, which is excreted. Food fiber is a waste of the column, was mistaken for the body is not good. With the development of science, from the middle of the 20th century, the digestion of dietary fiber