What is Apolipoprotein B (ApoB)?
ApoB is present on particles that carry cholesterol into tissues, such as LDL and other atherogenic particles. This often makes ApoB a sharper cardiovascular risk marker than LDL cholesterol alone. It can be especially useful when cholesterol values look acceptable, but particle burden may still be elevated.
Why is Apolipoprotein B (ApoB) relevant?
ApoB effectively counts the cholesterol-carrying particles capable of damaging the artery wall — and that particle count is what tracks with long-term cardiovascular risk. It is a useful addition that can prove decisive: in someone with normal LDL but elevated triglycerides, or with metabolic dysregulation, ApoB may still be elevated and reveal risk a standard lipid panel misses.
How to read Apolipoprotein B (ApoB) in context
Read ApoB alongside LDL cholesterol, non-HDL, and triglycerides. A high ApoB with relatively normal LDL means you carry many small, dense particles — a different risk picture than a high LDL with large, buoyant particles. Personal baseline, family history, and trends across repeat measurements usually weigh more than a single value.