膳食纤维是指食物中不能被人体消化吸收的多糖类物质。以往认为它无营养价值，于人体健康无关紧要。然而，近年来的研究表明，不少疾病如结肠癌、糖尿病、冠心病和心脑血管疾病等，都与膳食中缺乏食物纤维素有关。缺乏膳食纤维，更是“富贵病”的重要原因，是“食不厌精”的恶 Dietary fiber refers to the food can not be digested and absorbed polysaccharides. In the past that it has no nutritional value, does not matter in human health. However, recent studies show that many diseases such as colon cancer, diabetes, coronary heart disease and cardiovascular and cerebrovascular diseases are related to lack of dietary fiber in the diet. Lack of dietary fiber, but also “rich disease” is an important reason, “food is not too tired,” the evil