Liver transplantation has been the definitive treatment in end stage liver disease since couple of decades ago. The majority of liver transplant candidates are malnourished and suffer from perioperative morbidity related to undernutrition. To evaluate the status of malnutrition in a liver transplant candidate, a thorough nutritional assessment must be performed. Several adverse effects such as gastrointestinal trouble, renal toxicity, diabetes mellitus, hyperlipidemia and others are commonly seen after liver transplantation in relation to immunosuppressive treatment. Peritransplant obesity as one of the emerging morbidity could be a troublesome issue theses days in our country. Optimal nutrition therapy during all phases of liver transplantation according to ESPEN (European society for parenteral and enteral nutrition) guidelines will lead to improved outcomes. (SMN 2010;1:5-11)