LDL-P
A direct particle count of LDL — not a cholesterol concentration.
What is it
NMR spectroscopy measures the actual number of LDL particles circulating in blood. This is distinct from LDL cholesterol (LDL-C), which measures the cholesterol carried inside those particles.
Why it's measured
Some research suggests LDL particle number can be discordant with LDL cholesterol — meaning standard cholesterol values may not fully reflect particle burden. NMR particle counts have been associated with cardiovascular risk in published studies.
Reference range
Standard laboratory reference
< 1,000 nmol/L
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 research literature, even when LDL cholesterol values appear in range.
Lower
Is generally considered favorable in published research.
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
NMR LDL-P is part of advanced lipoprotein testing and is not included in standard panels.
Related markers
Common questions
NMR spectroscopy measures the actual number of LDL particles circulating in blood. This is distinct from LDL cholesterol (LDL-C), which measures the cholesterol carried inside those particles.
It's one of the markers used to build a fuller picture of your health. On its own it tells you very little, so it's most informative when reviewed alongside related markers.
It's measured from a standard blood draw at Quest or LabCorp. NMR LDL Particle Number is one of the markers included in the OPTML Apex Panel, where your results are read across systems and reviewed by a U.S.-licensed physician.
Reference ranges vary by laboratory, and a single value rarely tells the whole story. Review your result with a physician in the context of your other markers, symptoms, and history.
NMR LDL Particle Number is one signal among many. Answer a few quick questions and we’ll point you to the panel that fits.
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.
Find the right 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.
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