是剑桥饮食安全吗？

The Cambridge Diet was originally conceived in the 1970s by Alan Howard, who was a chemist at Cambridge University in Great Britain. The Cambridge Diet is based, in part, on the VLCD (very low calorie diet) and is largely liquid based, with low calorie soups, shakes, and meal replacement bars forming the basis of the diet. This diet provides most of its calories through liquid supplements, which are also fortified with vitamins to prevent malnutrition. People on this diet consume between 400 and 800 calories each day, and the diet is continued until the individual reaches his target weight, according to DietSpotlight.com. The diet was very popular in the 1980s, New York Times writer Jane E. Brody said in a Nov. 16, 1983, article, but faced substantial backlash over concerns about safety as well as allegations of false advertising.

饮食点出支持者，它的特效工作，而无需节食锻炼。他们还指出，具有其中所有的饭菜都准备并打包在事先饮食的好处。据该公司的网站，剑桥饮食也可以进行修改，以变通引起过敏的饮食限制。一个剑桥饮食的方面是，它应该利用被称为酮症的条件，根据DietSpotlight。酮症当主体被剥夺的葡萄糖，导致肝脏脂肪和脂质分解成酮，其可以被用作能量的替代源发生。因此，通过保持血糖水平郁闷，剑桥饮食要求的支持者脂肪可以非常迅速地燃烧。剑桥饮食是朝着病态肥胖的针对性和极端结果已经报告（一个月约30磅的体重损失）。剑桥节食的网站还解释说，由于限制条件的食谱规定，找人开始剑桥饮食必须特别剑桥饮食营养师见面，可能需要与这些营养学家监测例会。

许多医生都不愿意或者拒绝复议mmend the Cambridge diet as a result of its highly restrictive nature. In general, physicians recommend that patients consume at least 1200 calories per day, DietSpotlight says, whereas the Cambridge diet provides for only 400 to 800. This raises safety concerns because that level of caloric restriction is dangerously close to starvation, Brody wrote. Another danger of the Cambridge diet is its induction of ketosis, which is essentially a metabolic imbalance. According to an article in the University of California Berkeley Wellness Letter, while ketosis does cause the burning of fat, lean muscle is burned as well, which can be detrimental to the body. Some critics also raise concerns that the rapid weight loss can lead to loss of certain vital nutrients, such as potassium, calcium, and sodium. Low levels of potassium can lead to heart arrythmias and death. Finally, because the diet supplies much of its protein via dairy products, there are concerns about the effects of this diet on people who are lactose intolerant, Brody said. In short, there are significant health risks involved with the Cambridge Diet, Brody reported, and it should be utilized only under the right circumstances (i.e. morbid obesity but otherwise good health) and with careful medical supervision.