Non-alcoholic fatty liver disease (NAFLD) has several phases of flow: from simple steatosis, steatohepatitis, and ending with fibrosis and cirrhosis. NAFLD characterized by elevated liver enzymes in blood serum, the morphological changes in biopsies of the liver often associated with metabolic disorders. Metabolic syndrome represents a complex of many linked to pathobiochemical and pathophysiological factors levels influencing the extremely high risk of developing coronary heart disease (CHD), diabetes mellitus type 2 and other diseases associated with atherosclerosis. NAFLD proceeds favorably without significant morphological changes in most of the patients. In connection with this treatment is given only to patients with high risk of progression of this disease or the presence of marked changes in biochemical liver tests. Therefore, prevention and treatment of these conditions should be conducted before the complications and lead to improvement of the liver.