What is LDL cholesterol on a lipid panel?

LDL cholesterol is one fraction reported on a standard lipid panel, usually in mg/dL on U.S. reports. It is reviewed with HDL, triglycerides, and total cholesterol — not as a single verdict.

Why is my LDL different at two labs?

One laboratory may calculate LDL and another may measure it. Printed ranges can also differ. Compare each result to the range on that report.

Do I need to fast for an LDL test?

Many lipid panels are drawn fasting, especially when triglycerides will be used. Follow the instructions on your order and keep that note with the result.

Biomarker education

LDL cholesterol: What It Measures & Why People Track It

Also called: LDL-C, Low-density lipoprotein cholesterol

LDL cholesterol is one component of a lipid panel and is often discussed in conversations about cardiovascular risk.

General biomarker education — not personalized medical advice. Learn more

Result on your report

Illustrative

LDL cholesterol

118

Range: <100 – 129

<100Reference interval129

Tracking over time

Illustrative

2022202320242025

Data points for this trend chart
Date	Value
2022	6.1
2023	5.8
2024	5.5
2025	5.3

What it generally measures

LDL particles carry cholesterol in the blood. Labs report an LDL cholesterol value calculated or measured depending on the method used on your report.

Common units on reports: mg/dL

Why people track it over time

Many people watch LDL across years of panels to see how results moved relative to prior labs and any plan their clinician set. Direction alone is not a diagnosis.

Changes over time do not by themselves establish a diagnosis. Learn more

Questions you might ask a healthcare professional

Questions to bring

Illustrative

Ask whether the value was calculated or measured and which reference range applies on your report.

Ask how this result fits with HDL, triglycerides, and your overall history.

Discuss whether fasting status or recent illness could matter for interpretation.

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What this page does not do

LDL may be calculated or measured. Calculation formulas and printed intervals differ by laboratory. Fasting status can matter when triglycerides are part of the same panel. Use the method note and range on your source report.

Common questions

What is LDL cholesterol on a lipid panel?: LDL cholesterol is one fraction reported on a standard lipid panel, usually in mg/dL on U.S. reports. It is reviewed with HDL, triglycerides, and total cholesterol — not as a single verdict.
Why is my LDL different at two labs?: One laboratory may calculate LDL and another may measure it. Printed ranges can also differ. Compare each result to the range on that report.
Do I need to fast for an LDL test?: Many lipid panels are drawn fasting, especially when triglycerides will be used. Follow the instructions on your order and keep that note with the result.

Continue learning

Reference range

LDL cholesterol reference range

What the range on your report means for this marker.

Panel guide

Related panel guide

Understand the broader panel this marker appears on.

Related biomarker

HDL cholesterol

HDL cholesterol is another lipid-panel marker commonly reviewed alongside LDL and triglycerides.

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