Or...  An “imaginary meal” pill called fexaramine has been developed by researchers at the Salk's Gene Expression Laboratory. It has the ability to prevent weight gain, lower cholesterol, control blood sugar, and minimise inflammation in mice, with plans for human trials to begin shortly. The pill works by making the body believe it has consumed calories, causing it to respond by burning fat. Behaving in a different manner to other “diet pills”, it remains in the intestines and results in fewer side effects. Ronald Evans, director of Salk's, suggested that the pill can also have important health benefits, tackling obesity and being potentially crucial in aiding the treatment of diabetes.  Or the balloon in stomach thing will also become more prevalent. Basically, everything except your suggestion...