Apolipoprotein B (ApoB)
Here’s what it reflects — and what to do about it.
Longetic pulls together every lab and record you’ve had, follows how Apolipoprotein B (ApoB) changes over time, and explains what’s shifting — so you walk into your next appointment prepared, with reminders for retests along the way.
What is Apolipoprotein B (ApoB)?
A protein on the surface of the cholesterol particles most likely to clog arteries, so measuring it roughly counts how many of those particles you have.
Because there is one ApoB on each artery-clogging particle, this test estimates the number of harmful particles in your blood, which can add detail beyond a standard cholesterol test. A higher ApoB can be associated with more of these particles and a greater risk of atherosclerosis. It is not a routine screening test; the 2018 ACC/AHA cholesterol guideline treats an ApoB of 130 mg/dL or above as a risk-enhancing factor and notes a relative indication to measure it when triglycerides are 200 mg/dL or higher.
What to know about Apolipoprotein B (ApoB)
Understanding Apolipoprotein B (ApoB) means knowing what it reflects, what tends to move it, and the signs that suggest it’s worth a closer look — so you can bring the right questions to your next appointment.
This glossary entry is for informational purposes only and is not a substitute for professional medical advice. Read our Medical Disclaimer.
References
About our sources
Official sources
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Peer-reviewed research
Original research articles and systematic reviews published in indexed journals and verified through PubMed or DOI.