Normal triglyceride levels fall below 150 milligrams per deciliter, equivalent to below 1.7 millimoles per liter, according to Mayo Clinic. Doctors test triglyceride levels by performing a lipid panel or lipid profile, and use the results to determine a patient’s heart health.
Triglycerides are lipids that are present in the blood and stored in fat cells, and elevated levels indicate a heightened risk of cardiovascular disease, notes Cleveland Clinic. Levels between 150 to 199 milligrams per deciliter, or 1.8 to 2.2 millimoles per liter, are considered borderline high. Levels between 200 to 499 milligrams per deciliter, or 2.3 to 5.6 millimoles per liter, are considered high. Levels above 500 milligrams per deciliter, or 5.7 millimoles per liter, are considered very high.