The liver stores excess sugars that you eat, or that are in your blood, in the form of a chemical called glycogen. Glycogen absorbs nearly 6 times its weight in water, so your liver is also important for water storage. When your body needs more sugars (like between meals), your liver breaks down the glycogen into glucose, which the rest of your body uses for fuel. The liver does this for the rest of your body, as the liver itself can't use glucose for energy.