The liver and nutrition are closely related , as the liver plays an important role in metabolism of different nutrients, so that most liver diseases are usually associated with a variety of metabolic abnormalities and different degrees of malnutrition which requires frequent regular nutritional assessment for its detection. Nutritional therapy is a respectable aspect in the management of liver disease and may be the cornerstone in the treatment, as in case of some metabolic diseases e.g. glactosemia. Also , nutritional therapy improves the prognosis of liver transplantation . One aspect of nutritional therapy is the herbal therapy which showed promising effects in the treatment of liver diseases . On the other side malnutrition may injure the liver and causes liver damage which must be detected and properly managed.