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Triglyceride concentration in serum or plasma (fasting)

Published: August 9, 2026Updated: August 16, 2026

This test measures the amount of triglycerides, a type of fat, in your blood after you’ve fasted for 8–12 hours. High levels may indicate increased risk for heart disease or other health concerns.

Quick summary

["Triglycerides are a key marker for heart health when measured fasting."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
94872-9
Short code
Chol + Trigl Pnl Fld
Synonyms
Chol + Trigl Pnl Fld
Category
glucose
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
true
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why This Test Matters

Your doctor may order this test to assess your risk for cardiovascular conditions, such as heart disease or high cholesterol. It can also help diagnose or monitor metabolic disorders like diabetes or pancreatitis.

What to Expect Before the Test

You’ll need to fast (no food or drink except water) for 8–12 hours before the test. Your blood will be drawn from a vein, usually in your arm, and sent to a lab for analysis.

How the Test Works

The lab uses a sensitive method to detect triglycerides in your blood sample. Results are reported as a concentration value, though exact reference ranges vary by lab.

Common Reasons for Testing

Doctors may recommend this test if you have symptoms like abdominal pain, unexplained weight loss, or if you have risk factors for high triglycerides, such as obesity, diabetes, or a family history of heart disease.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Fasting Triglycerides

Frequently asked questions

What does a high triglyceride level mean?
A high result may signal an increased risk for heart disease or other metabolic issues. Your doctor will interpret results in the context of your overall health and may recommend further testing or changes to diet, exercise, or medications.
What should I do if my triglyceride levels are high?
If your levels are elevated, follow your doctor’s advice, which may include improving diet (reducing saturated fats and sugars), increasing physical activity, or taking prescribed medications. Avoid alcohol before testing, as it can raise triglyceride levels.
Can I eat or drink anything before my test?
No, you must fast for 8–12 hours before the test. Only water is allowed. Check with your lab or doctor for any specific fasting instructions.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy