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食物纤维是以多糖类为主的食品成分,不能为人的消化酶消化。但是,通过消化试验证明有相当一部分食物纤维被分解。1982年日本科学技术厅以男女学生为对象,对海藻及蕈类食物纤维进行了消化试验。结果表明单纯食物纤维的消化率在25～78%。其它国家的报告也认为许多食品在通过消化道时,有相当量的食物纤维消失,这是因为被肠内细菌所分解。Cumming认为食物纤维被分解后所生成的乙酸、丁酸等低分子量脂肪酸被部分吸收,有可能成为热能来源。最近G ranzon等研究成人对食物纤维的消化率,
Food fiber is a polysaccharide-based food ingredients, digestive enzymes can not be digested. However, digestion tests showed that a significant portion of the dietary fiber was broken down. 1982 Japan Science and Technology Agency for male and female students as the object, the algae and mushroom food fiber digestion test. The results showed that dietary fiber digestibility of 25 to 78%. Other countries report that many foods disappear when they pass through the digestive tract due to the breakdown by intestinal bacteria. Cumming believes that low molecular weight fatty acids, such as acetic acid and butyric acid, which are produced after food fiber is decomposed, are partially absorbed and may become a source of heat energy. Recent G ranzon and other studies of adult digestibility of dietary fiber,