ApoB vs LDL Cholesterol: Which Number Actually Predicts Heart Attack?

Apolipoprotein B (ApoB) is a structural protein present in exactly one copy on every atherogenic lipoprotein particle — LDL, VLDL, IDL, Lp(a) and chylomicron remnants. Because it is a one-to-one particle count, ApoB captures the true burden of arterial exposure in a way that a cholesterol mass measurement cannot.