Prealbumin is a plasma protein synthesized by the liver, which carries and transmits vitamin A as well as thyroxine to the body, and also strengthens the body’s immunity and has some anti-tumor effects. When prealbumin is low, it is often considered that there may be a tumor or inflammation in the body, resulting in a negative nitrogen balance. Patients with a history of hepatitis are susceptible to subacute liver injury, which can also be seen in malnourished people. Therefore, the body should supplement prealbumin in time to strengthen the body and prevent diseases.