What does it measure?
Triglycerides move energy through your bloodstream and can be stored in fat tissue for later use. The test is part of a lipid profile. It helps assess metabolic and cardiovascular health, especially when read with HDL, non-HDL cholesterol, and glucose results. [1]
Before the test
- Sample
- Blood for a lipid profile.
- Fasting
- Some lipid profiles can be taken without fasting. Follow the laboratory’s instructions for your order, especially if triglycerides are being rechecked.
What can the result mean?
A higher level can accompany insulin resistance, diabetes, inherited conditions, or certain medicines. Meals and alcohol can also raise it. Very high triglycerides require prompt clinical attention because they can increase the risk of pancreatitis. Low levels usually need interpretation only when unexpected or linked with other concerns. [1]
When is it useful, and how is it read?
Moderately raised triglycerides contribute to the metabolic and cardiovascular picture. Very high levels also raise concern for pancreatitis, changing the urgency and purpose of follow-up. Glucose patterns, medicines, and alcohol use help explain why triglycerides may be elevated. [1] [3] [4]
What can affect it?
A recent meal can make a meaningful difference. Many initial lipid tests do not require fasting, but a clinician may request a fasting repeat after a high result. Follow the specific instructions and mention pregnancy, medicines, and recent illness. [2]
They are a different type of fat from cholesterol
Triglycerides mainly store and carry energy, while cholesterol also helps build cells and hormones. They travel together in some particles, but a triglyceride result and a cholesterol result answer different questions. [1] [3]
Questions you might have
Can eating before the test change triglycerides?
Yes. A meal can increase them. Tell the laboratory whether you fasted; a clinician may request a fasting repeat to clarify a result. [1] [2]
Why are very high triglycerides handled differently?
Alongside cardiovascular risk, very high levels can increase pancreatitis risk. The degree of elevation changes the clinical question. [1]
What comes next?
Ask which factors are most relevant for you: glucose management, alcohol if applicable, medicines, food patterns, or inherited risk. The plan may include changes to sugary drinks and activity, and sometimes treatment. Severe elevations need a clinician-led plan rather than a routine lifestyle check-in months later. [1]
Do I need a fasting repeat, and is this level high enough to change how soon we act?
The reference interval and units on your report are part of understanding your result. Understand units, reference intervals, and treatment targets.
Sources & references
Medical references & original research
Books we consulted
References that informed our explanations of the test and its context.
- Pagana KD, Pagana TJ, Pagana TN. Mosby’s Diagnostic and Laboratory Test Reference. 14th ed. Elsevier; 2019.
- Provan D, editor. Oxford Handbook of Clinical and Laboratory Investigation. 4th ed. Oxford University Press; 2018.
Practical-section sources accessed: .
For general health education. Interpreting your result and deciding on tests or treatment requires your health context and a qualified clinician.
