我们每天吃入的食物,糖类约占80％左右,食物中的糖类主要是淀粉。淀粉是一种多糖,它由几百个甚至上千个葡萄糖分子所组成。当淀粉水解时,经过糊精和麦芽糖等中间产物,最后变成组成淀粉的最小单位——葡萄糖。在吃入的糖中,还有少量的双糖,主要是蔗糖、乳糖和麦芽糖。双糖是由两分子单糖组成 The food we eat every day, about 80% of sugar, the main carbohydrate in food is starch. Starch is a polysaccharide that consists of hundreds or even thousands of glucose molecules. When the starch is hydrolyzed, it goes through the intermediate products of dextrin and maltose, and finally becomes the smallest unit of starch - glucose. In the sugar, there are a small amount of disaccharides, mainly sucrose, lactose and maltose. Disaccharides are composed of two molecules of monosaccharides