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Understand Non-HDL/ApoB Ratio

Non-HDL/ApoB Ratio

Heart & circulation markers

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

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Updated Jul 13, 2026

What is Non-HDL/ApoB Ratio?

A calculated ratio estimating how much cholesterol is carried per atherogenic (ApoB-containing) particle.

This is a calculated value: it divides your non-HDL cholesterol (total cholesterol minus HDL) by your apolipoprotein B (roughly the number of atherogenic particles) - Non-HDL-C divided by ApoB. A lower ratio can be associated with a greater proportion of small, dense particles, a higher ratio can be associated with larger, more cholesterol-rich particles. It is an interpretive research estimate, not a diagnostic test.

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

References

Clinical "Cholesterol Levels: What You Need to Know (non-HDL)" MedlinePlus (NIH/NLM). medlineplus.gov/cholesterollevelswhatyouneedtoknow.html.

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, calculated index, formula + sources independently fact-checked.

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