Both Flat Belly Diet as well as Firm Up are two specialized and proven weight loss methods. However, the implementation is a little different. Mostly, in Firm Up in 3 weeks one is prescribed with a special blending diet along with strength training as well as aerobic exercise for a span of three weeks which initiate the process of weight loss. However, in The Flat Belly Diet, which is centred on the Mediterranean food style, exercise is optional but one is prescribed with a diet rich in monounsaturated fats. This is claimed as helping in controlling appetite and thus helps one to lose up to 15 pounds in a span of 32 days flat.