Triglycerides levels, explained
Triglycerides are the most common type of fat in the blood and a marker of how your body handles dietary fat and sugar.
What’s a normal TG level?
Typical adult reference range, shown for orientation. Your report’s range may differ by lab, age, and sex — the analyzer uses your report’s own ranges when available.
What high and low TG mean
A value outside the reference range is a flag, not a diagnosis. Here’s what each direction usually points to — and the most common causes.
High triglycerides are usually driven by diet and metabolism and add to cardiovascular risk; very high values risk acute pancreatitis.
- Excess refined carbohydrates, sugar, and alcohol
- Excess weight, inactivity, and insulin resistance
- Poorly controlled diabetes
- Hypothyroidism, kidney disease, or genetics
Low triglycerides are usually not a concern and often reflect a low-fat diet or healthy metabolism; very low values are rare.
- Low-fat diet or fasting before the test
- Hyperthyroidism
- Malnutrition or malabsorption (very low values)
When a TG result needs attention
Triglycerides above ~500 mg/dL substantially raise the risk of pancreatitis and need prompt management; persistently high levels with other metabolic markers warrant a cardiovascular risk review.
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Triglycerides — frequently asked questions
- What is a normal triglyceride level?
- Normal is below 150 mg/dL. 150–199 is borderline high, 200–499 is high, and 500 or above is very high. Triglycerides are usually measured fasting, since a recent fatty meal can temporarily raise them.
- What causes high triglycerides?
- The biggest drivers are excess refined carbohydrates, sugar, and alcohol, along with excess weight, inactivity, insulin resistance, and poorly controlled diabetes. Hypothyroidism, kidney disease, and genetics can also contribute. They often rise together with low HDL.
- How do I lower triglycerides fast?
- Cutting sugar, refined carbs, and alcohol produces the quickest drop, often within weeks, alongside exercise and weight loss. Omega-3 fats help, and for very high levels clinicians may prescribe medication to reduce the risk of pancreatitis.
Related lab markers
- HDL Cholesterol →HDL cholesterol — the "good" cholesterol — helps clear cholesterol from the arteries, so higher levels are generally protective.
- LDL Cholesterol →LDL cholesterol — often called "bad" cholesterol — is the lipid fraction most directly linked to plaque buildup and cardiovascular risk.
- Hemoglobin A1c →HbA1c reflects your average blood sugar over roughly the past three months — the standard test for diagnosing and monitoring diabetes.
- All lab markers →Browse every biomarker guide in one place.
This page provides educational health information and does not replace professional medical advice, diagnosis, or treatment. Interpret any lab value with your clinician, who has your full medical context. For emergencies, contact emergency services.