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Comparison · longevity

LDL Particle Number vs LDL-C

LDL-P measures the count of LDL particles via NMR. LDL-C measures the cholesterol carried inside those particles. Like ApoB vs LDL-C, particle count outperforms cholesterol mass when the two diverge — particularly in metabolic syndrome.

Reviewed by Dr. Laura PurdyMay 29, 2026
Attribute
LDL Particle Number (LDL-P)
LDL-C
Methodology
NMR spectroscopy
Calculated or direct assay
What it measures
Particle count
Cholesterol mass
Discordance handling
Resolves small-dense LDL
Misses small-dense LDL
Relationship to ApoB
Highly correlated
Imperfect proxy
Availability
Specialty panel
Standard panel
Choose LDL Particle Number (LDL-P)

LDL-P is decisive when small-dense LDL is suspected, when ApoB is unavailable, or when prior cardiovascular events are present.

Choose LDL-C

LDL-C is sufficient when lipid profile is concordant and metabolic markers are clean.

Educational. Final pathway selection is provider-reviewed via synchronous video consultation against your biomarkers, history, and goals.

Frequently asked

Do I need both LDL-P and ApoB?

Usually no — they convey the same information; ApoB is more widely available.

Which is on the standard panel?

LDL-C is standard; LDL-P is added during cardiovascular-anchored optimization.

Next step

Take the optimization assessment.

The adaptive assessment maps your symptoms, history, and goals to candidate pathways — and routes you into provider review.

Begin assessment