The liver plays an important role in the digestion and processing of proteins, fat and sugar. The liver helps create some of the building blocks of proteins needed for the body known as amino acids. The liver plays an important role in fat digestion as well as the production of fats needed for the function of different organs of the body. Simple sugars are created in the liver by breaking down both proteins as well as more complex sugars known as glycogen. The liver can also convert simple sugar into glycogen which is better for storage. In this way the liver acts as an energy center for the body. It controls the balance of simple and complex sugar storage and releases sugar stores when needed for energy.