Many weight loss products these days promise you are able to lose 30 pounds in 30 days or maybe 7 pounds in 7 days. The problem with the bulk of them is that they do not really promote that weight loss, or if they do, the majority of it's water weight. Water weight by nature is readily lost, but in addition very easily gained. And ultimately, it does not come up with a large difference in inches. But a pound of fat is equal in mass to about a gallon. Therefore to burn off a considerable amount of fat, you must expect about 2 pounds per week max.