Triglyceride levels are defined as follows:

• normal is less than 150 mg/dL

• 150-199 mg/dL is borderline high

• 200-499 mg/dL indicates high triglycerides

• 500 mg/dL or above indicates a very high triglyceride level

Abnormally low triglyceride levels may be an indication that the person is affected by impaired absorption of nutrients in the intestine (malabsorption syndrome). Malnutrition, hyperthyroidism, and severe liver disease can also cause triglyceride levels to be abnormally low.