乳及乳制品富含优质蛋白,多种矿物质和维生素,是改善人类营养、增强体质的理想食品。随着生活水平的改善,我国居民乳类的摄入量有所提高。但乳及乳制品中含有大量乳糖,必需经乳糖酶分解才能被吸收。由于遗传、饮食习惯等因素的影响,部分人因体内乳糖酶活性低或小肠黏膜乳糖酶缺 Milk and dairy products are rich in high-quality protein, a variety of minerals and vitamins, is to improve human nutrition, enhance physical fitness ideal food. With the improvement of living standards, our residents’ milk intake has increased. However, milk and dairy products contain large amounts of lactose, must be degraded by lactase to be absorbed. Due to genetic, eating habits and other factors, some people due to low lactase activity or small intestinal mucosal lactase deficiency