Quick Fact

One pound of fat is approximately 3500 calories. So if you were to eat around 350 calories more per day than your body uses, in just ten days, you'd gain one pound of fat. If you kept that amount of excess every day, you'd continue to gain weight until your body reaches an equilibrium where the extra fat it's maintaining burns the 350 extra calories. But fat cells only burn 2.05 calories per pound...so I don't really think anyone wants to reach an equilibrium.