随着人们生活水平的不断提高,人们的饮食结构发生了很大的变化,肥胖人、超重人逐渐增多,患糖尿病的人数也随之增加。目前,全世界有糖尿病患者1.3亿人[1],西方发达国家糖尿病的患病率约为5%,我国糖尿病的患病率在2%～3%,比10年前高了3～4倍[2]。糖尿病是一种终身治疗性疾病,由于 With the continuous improvement of people’s living standards, people’s diet has undergone great changes. The number of obese people and overweight people gradually increases, and the number of people suffering from diabetes also increases. At present, there are 130 million people with diabetes in the world [1]. The prevalence of diabetes in the developed western countries is about 5%. The prevalence of diabetes in China is between 2% and 3%, 3 to 4 times higher than 10 years ago [2]. Diabetes is a lifelong therapeutic disease due to