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The triglyceride level is a blood test to measure the amount of triglycerides in your blood. Triglycerides are a type of fat.
Your body makes some triglycerides. Triglycerides also come from the food you eat. Extra calories are turned into triglycerides and stored in fat cells for later use. If you eat more calories than your body needs, your triglyceride level may be high.
A test for high blood cholesterol levels is a related measurement.
A blood sample is needed. Most of the time blood is drawn from a vein located on the inside of the elbow or the back of the hand.
You should not eat for 8 to 12 hours before the test.
Alcohol and some medicines can interfere with blood test results.
You may feel slight pain or a sting when the needle is inserted. You may also feel some throbbing at the site after the blood is drawn.
Triglycerides are usually measured together with other blood fats. Often it is done to help determine your risk of developing heart disease. A high triglyceride level may lead to atherosclerosis, which increases your risk of heart attack and stroke.
A high triglyceride level may also cause swelling of your pancreas (called pancreatitis).
Results may indicate:
Normal value ranges may vary slightly among different laboratories. Talk to your provider about the meaning of your specific test results.
The examples above show the common measurements for results for these tests. Some laboratories use different measurements or may test different specimens.
High triglyceride levels may be due to:
Overall, the treatment of elevated triglyceride levels focuses on increased exercise and changes in the diet. Drugs to lower triglyceride levels may be used to prevent pancreatitis for levels above 500 mg/dL.
Low triglyceride levels may be due to:
Pregnancy can affect test results.
Miller M, Stone NJ, Ballantyne C, et al. Triglycerides and cardiovascular disease: a scientific statement from the American Heart Association. Circulation. 2011;123(20):2292-2333 PMID: 21502576 www.ncbi.nlm.nih.gov/pubmed/21502576.
Semenkovich CF. Disorders of lipid metabolism. In: Goldman L, Schafer AI, eds. Goldman-Cecil Medicine. 25th ed. Philadelphia, PA: Elsevier Saunders; 2016:chap 206.
Stone NJ, Robinson JG, Lichtenstein AH, et al. Treatment of blood cholesterol to reduce atherosclerotic cardiovascular disease risk in adults: synopsis of the 2013 American College of Cardiology/American Heart Association cholesterol guideline. Ann Intern Med. 2014;160(5):339-343. PMID: 24474185 www.ncbi.nlm.nih.gov/pubmed/24474185.
Reviewed By: Michael A. Chen, MD, PhD, Associate Professor of Medicine, Division of Cardiology, Harborview Medical Center, University of Washington Medical School, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.