What are deficiencies of protein?

The human body contains thousands of different proteins. The daily intake of protein from food supports the formation and maintenance of these proteins. Deficiency of protein in the body can sometimes be caused by malfunctions of some of the body's organs like the liver. Other causes that are not directly related to the organs are the low intake of protein rich food. A person might be feel energetic from the considerable amount of food eaten but if these do not contain enough protein it can lead to serious consequences. This is what is called short term protein deficiency.