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膳食纤维是什么?从化学结构来看,它是人体消化酶所不能水解的食物成分,包括植物源的纤维素、半纤维素、木质素和果胶四大类。在1970年以前,营养学界没有膳食纤维这个名词,当时只称作粗纤维,原因是考虑到粗纤维吃多了,会影响人体对营养素的吸收。后来,过去的粗纤维被改称为膳食纤维,多项科学研究证实,许多疾病的发生都与缺少膳食纤维有关,同时,膳食纤维成了人体所需的第七大营养素。根据膳食纤维在水中的溶解性,将它分为可溶性膳食纤维和不可溶性膳食纤维两大类。不可溶性膳食纤维包括纤维素、木
What is dietary fiber? From the chemical structure, it is the human digestive enzymes can not be hydrolyzed food ingredients, including plant-derived cellulose, hemicellulose, lignin and pectin four categories. Before 1970, the nutrition community did not have the term dietary fiber. At that time, it was only called crude fiber, because taking into consideration that crude fiber would eat more and would affect the body’s absorption of nutrients. Later, the past, the crude fiber was renamed as dietary fiber, a number of scientific studies have confirmed that many diseases are associated with the lack of dietary fiber, while dietary fiber has become the body’s seventh largest nutrient. According to the solubility of dietary fiber in water, it is divided into two categories: soluble dietary fiber and insoluble dietary fiber. Insoluble dietary fiber, including cellulose, wood