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Total Triglycerides (Serum or Plasma)

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

This test measures the amount of triglycerides, a type of fat found in your blood, which can help assess your risk for heart disease and other health conditions.

Quick summary

["Triglycerides are a key indicator of heart health and metabolic well-being."]

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

Key facts at a glance

LOINC
39801-6
Short code
Trigl Plr-sCnc
Synonyms
Trigl Plr-sCnc
Category
glucose
Sample
fluid
Container
Sterile tube
Units
N/A
Fasting
true
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
2-5 mL
Stability
Room temperature: 2h, Refrigerated: 24h
Hemolysis max
300
TAT
4–24 hours
Order
routine

Why It Matters: Your Blood Fat Levels

Triglycerides are a form of fat that your body stores and uses for energy. High levels can increase your risk of developing heart disease, stroke, or other health problems. Your doctor may recommend this test if you have a family history of high cholesterol, diabetes, or obesity, or if you’re at risk for cardiovascular issues.

How the Test Works

Blood is drawn from a vein in your arm and sent to a lab. The lab uses a chemical process to measure the triglycerides in your serum or plasma. The result is expressed in milligrams per deciliter (mg/dL) or another standard unit.

What to Expect Before the Test

You can eat and drink normally before the test, but avoid heavy meals or alcohol for a few hours beforehand. Wear comfortable clothing and let your doctor know if you’re on any medications, as some may affect your results.

Possible Results and Interpretation

Results are compared to general reference ranges, but your doctor will consider your overall health, other test results, and medical history to interpret them. Very high or very low levels may require further evaluation.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: High and Low Triglycerides

Short name

Triglycerides

Frequently asked questions

What does my triglyceride level mean?
High triglyceride levels (above normal ranges) may suggest an increased risk of heart disease, pancreatitis, or other metabolic disorders. Low levels may indicate normal fat metabolism, but they can also be linked to certain genetic conditions or deficiencies.
Can diet or lifestyle changes affect my triglyceride levels?
Yes, diet, exercise, and weight management play a major role. Reducing saturated fats, sugars, and alcohol, while increasing fiber and healthy fats (like omega-3s), can help lower triglycerides. Your doctor may also recommend medications if lifestyle changes aren’t enough.
How often should I get this test?
Your doctor will determine how often you need this test based on your health status, risk factors, and other medical conditions. Regular check-ups are important, especially if you have conditions like diabetes, high blood pressure, or a family history of heart disease.
  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