日益增多的体重过重和肥胖症,已经是一个社会公共卫生问题。在中国肥胖者已超过7000万,2002年北京市调查显示,中老年肥胖比例已达30%左右;在大多数西欧国家,成人肥胖发生率在10~25%,在美洲一些国家为20~25%。肥胖症像其他因生活方式变化所导致的慢性病一样,在世界各地,尤其是亚 Increasing overweight and obesity is already a social and public health problem. In China, more than 70 million obese people were surveyed. According to a survey conducted in Beijing in 2002, the obesity rate among middle-aged and old people has reached about 30%. In most Western European countries, the incidence of obesity in adults ranges from 10 to 25% and in some American countries from 20 to 25 %. Like other chronic diseases caused by changes in lifestyle, obesity is common in all parts of the world, especially in Asia