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Understand LDL Particle Size

LDL Particle Size

Heart & circulation markers

What the test generally measures, and what to ask about it.

Longetic keeps every lab and record you’ve had organized and easy to find, so your own LDL Particle Size values sit together on one chart and you walk into your next appointment prepared.

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Updated Jul 13, 2026

What is LDL Particle Size?

A measure of how big or small your typical LDL particles are, sometimes reported as pattern A (larger) or pattern B (smaller).

This test looks at the size of your LDL particles, often summarized as a pattern: pattern A means your LDL tends to be larger and more buoyant, while pattern B means it tends to be smaller and denser. Larger average particle size has been associated with lower cardiovascular risk and smaller size with higher risk in research reviews, though the relationship is not perfectly consistent between studies. It is an advanced, optional marker best understood alongside particle number and the rest of your lipid results rather than on its own.

This glossary entry is for informational purposes only and is not a substitute for professional medical advice. Read our Terms of Use.

References

Peer-reviewed "Size and number of lipoprotein particles for cardiovascular risk prediction (PMID 36522243)" PubMed. doi.org/10.1016/j.arteri.2022.11.001.

About our sources

Clinical / professional

Medical societies, specialty colleges, and professional associations whose consensus statements reflect clinical practice standards.

Peer-reviewed research

Original research articles and systematic reviews published in indexed journals and verified through PubMed or DOI.

History of updates

Published · Jul 13, 2026
First published; written and independently fact-checked against the cited sources.

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