Heart & arteries
ApoB Apolipoprotein B
A marker related to atherogenic lipoprotein particles - increasingly considered a more direct measure of cardiovascular risk than LDL cholesterol alone.
In short
- What is measured
- Apolipoprotein B (ApoB) is a structural protein found on the surface of every atherogenic lipoprotein particle in your blood - that includes LDL, VLDL, IDL, and lipoprotein(a).
- What the value shows
- ApoB reflects particle number, not just the cholesterol they carry.
- Reference range
- < 90mg/dL
What it is
The basics
Apolipoprotein B (ApoB) is a structural protein found on the surface of every atherogenic lipoprotein particle in your blood - that includes LDL, VLDL, IDL, and lipoprotein(a). Each of these particles carries exactly one ApoB molecule, so measuring ApoB directly counts the number of cholesterol-carrying particles that can deposit in artery walls.
What it tells you
Why this marker matters
ApoB reflects particle number, not just the cholesterol they carry. Two people can have identical LDL-C values but very different particle counts - and the one with more particles carries the higher cardiovascular risk. That is why an increasing number of cardiology guidelines now treat ApoB as a more direct marker of long-term arterial risk than LDL-C alone.
Reference range
Where the typical ranges sit
Optimal typically < 90 mg/dL; lower targets apply at higher cardiovascular risk.
ApoB targets are set by cardiovascular risk rather than by a single population range. The European guideline we cite (ESC/EAS 2019) gives below 100 mg/dL at moderate risk, below 80 mg/dL at high risk, and below 65 mg/dL at very high risk. Around 90 mg/dL is often quoted as a general optimum for people at low risk, but it is a rule of thumb rather than a guideline figure. Ranges differ between European, American, and national guidelines, so the tier you are being measured against matters more than the number alone.
Reference ranges differ between laboratories and guidelines. Your CHIRAYOU report uses the range reported by the analysing laboratory, and your interpretation should be discussed with a physician.
What affects it
Common influencers
- Saturated and trans fat intake
- Body weight and visceral fat
- Insulin resistance and type-2 diabetes
- Genetics (familial hypercholesterolaemia)
- Physical activity and aerobic fitness
- Lipid-lowering medications (statins, ezetimibe, PCSK9 inhibitors)
When to follow up
If your value is outside the range
A single elevated ApoB does not diagnose anything by itself. If your value is above the optimal range, particularly in the context of family history, blood pressure, or HbA1c findings, discussing it with a physician is the appropriate next step - they can weigh the full cardiovascular picture and decide whether lifestyle change, additional testing, or treatment is indicated.
