When your body’s energy needs are met and your glycogen stores are full, the excess sugar in your blood is converted to fat, as we’ll discuss below. Fat stores are a bit more difficult to use for fuel—there are more intermediate steps to convert them to a burnable form. But fat is a much more efficient way to store energy than glycogen, because it’s energy dense and doesn’t hold water. And as we know all too well, there’s virtually no limit to how much fat the human body is able to store.
