Definition
What ApoB measures
Apolipoprotein B is one protein per atherogenic lipoprotein particle (LDL, VLDL, IDL, and Lp(a)). The ApoB number is therefore a particle count, not a cholesterol mass.
Illustrative sample band · Synthetic
96mg/dL
0Sample target 40–80 mg/dL104
Why it matters
How clinicians usually read it
Particle number often tracks atherosclerotic risk more tightly than LDL cholesterol when the two disagree — for example in high-triglyceride or insulin-resistant patterns.
When it reads low
A lower value can mean
Lower ApoB usually means fewer atherogenic particles. That is typically the intended direction after lifestyle or lipid-lowering therapy.
When it reads high
A higher value can mean
Higher ApoB means more particles that can enter artery walls, even if LDL cholesterol looks acceptable. Family history and Lp(a) still belong in the same conversation.
Questions for a clinician
Bring the number into a real conversation
01
Does my ApoB agree with LDL cholesterol, or is this a discordant pattern?
02
Should Lp(a) be considered alongside this particle count?
03
What would a meaningful change look like on the next draw?
Educational boundary
Educational information only. Displayed ranges are illustrative sample bands, not a diagnosis, treatment plan, or substitute for the contracted laboratory report and a qualified clinician.
See it as a sample result
The sample dashboard shows an illustrative reading, target band, and trend for ApoB.