Triglycerides — Normal Range & Interpretation

Clinical Context

Triglycerides measure circulating fats transported by VLDL and chylomicrons after dietary intake and hepatic synthesis. The value reflects cardiovascular risk, insulin resistance, and pancreatitis risk, and it anchors the lipid panel alongside LDL, HDL, and total cholesterol. Accurate interpretation requires a 9 to 12 hour fasting specimen, since recent meals elevate results substantially.

Elevations occur with obesity, metabolic syndrome, uncontrolled type 2 diabetes, excessive alcohol intake, hypothyroidism, nephrotic syndrome, and medications such as thiazides, beta-blockers, estrogens, corticosteroids, and protease inhibitors. Familial hypertriglyceridemia drives severe elevations. Low triglycerides point to malnutrition, malabsorption, hyperthyroidism, or end-stage liver disease. Levels at or above 500 mg/dL signal acute pancreatitis risk and demand fibrate therapy, while levels between 150 and 499 respond to lifestyle modification, weight loss, omega-3 fatty acids, and glycemic control.

High-yield for NP boards: the 150 mg/dL upper limit, the pancreatitis threshold at 500 mg/dL, and the fasting requirement for accurate results. Expect questions linking hypertriglyceridemia to metabolic syndrome criteria, which require triglycerides of 150 or higher. Candidates also identify fibrates as first-line therapy for severe elevations and recognize secondary causes including alcohol use, uncontrolled diabetes, and hypothyroidism before initiating pharmacotherapy.

Related Labs

• Total Cholesterol — mg/dL
• LDL — mg/dL
• HDL — mg/dL

Sources

• MedlinePlus