LDL-C
The cholesterol carried by LDL particles — the most-discussed lipid risk marker.
What is it
LDL cholesterol measures the cholesterol contained inside low-density lipoprotein particles. LDL has historically been called 'bad cholesterol' because elevated levels have been linked to plaque formation.
Why it's measured
LDL-C has been associated with cardiovascular risk across a large body of research and is a primary target of lipid-lowering therapy in clinical practice.
Reference range
Standard laboratory reference
< 100 mg/dL
Reference ranges vary by laboratory. Your individual reference range will appear on your test report and should be interpreted by your physician in the context of your overall health profile.
What results may indicate
Elevated
Has been associated with elevated cardiovascular risk in published research.
Lower
Is generally considered favorable.
These associations are general. They are not a personal diagnosis or prediction. Discuss your individual results with your physician in the context of your full health profile.
When it's measured
Part of every standard cholesterol panel.
Related markers
Measured in
A complete look at your heart, hormones, metabolism, inflammation, and longevity systems — drawn at Quest or LabCorp, reviewed by a U.S.-licensed physician.
Explore the Apex Panel →This information is for general educational purposes only and is not medical advice. Lab results alone are not intended to diagnose, treat, or cure any condition and do not replace the advice of a healthcare provider. OPTML does not offer medical advice, a diagnosis, medical treatment, or any form of medical opinion.