Well, because the cells of our body actually use that glucose to form the energy ATP molecules. And the ATP molecules are then used to power many different types processes such as, for instance, gluconeogenesis. So remember, gluconeogenesis actually uses up on that amount of ATP and GTP molecules. Now, liver cells and kidney cells can undergo gluconeogenesis and they do actually undergo gluconeogenesis to a very large extent compared to other cells because other cells such as brain cells and muscle cells don't actually use gluconyogenesis, they only use it to very small extent under very extreme conditions. And in fact, we have cells of our bodies, such as red blood cells, that cannot use gluconyogenesis at all. And that's because red blood cells actually don't have mitochondria.