Here is my crazy theory on metabolism. Your metabolic rate is how fast you burn food/age/heal/move/heart rate/etc. The fatter (less fit) that we are the higher our resting heart rate/BMR/maintenance calories. The fitter we are the lower our resting heart rate/BMR/maintenance calories. Therefore, the fitter we become the lower our metabolisms and the less food we need. Fatter people have always believed that we are fatter because of a lower metabolic rate. I beg to differ. I believe that the fatter we are the higher our metabolic rates, but (and its a big butt) the higher our weight set point (biological response unrelated to metabolism). So, as we get fitter and loose weight, the more efficient our body's become and the less food we need to maintain our weight, hence an obvious lower metabolic rate. This is actually a good thing. The lower our metabolic rate, the slower we age, the longer our organs stay healthy. So the key here is to lower the metabolic rate by lowering the weight and increasing the level of fitness (with exercise). The only thing that has always thrown the kabosh on the whole thing in the past has been the little known "set point". With a stable high set point your body would force you to eat (hunger, cravings, daydreaming of food...[homer simpson] hmmmm cake [/homer simpson]), so you could not maintain the lower, fitter weight. Dr Robert's miracle actually breaks that barrier by allowing us to eat less, be fitter and by lowering our metabolic rates, live much longer.