High triglycerides are one of the most common signs of fatty liver disease. Normally, these lipids are stored in fat cells and used for energy. When there is too much fat in the blood, it is not metabolized properly; the body stores the excess in the liver, which leads to fatty liver disease. Plasma triglycerides greater than 200 mg/dL fall in the high range, while a reading greater than 500 mg/dL is very high. As the causes of this disease are still unknown; however, some doctors believe that hypertriglyceridemia may be a risk factor rather than a symptom of the fatty liver disease.