VLDL Cholesterol Accounts for One-Half of the Risk of Myocardial Infarction Associated With apoB-Containing Lipoproteins

We tend to think of LDL as the cholesterol that causes heart attacks. This Copenhagen study complicates that picture in a way that matters for how risk is understood — and quietly reinforces why counting particles beats tracking a single number.

Using detailed lipid profiling in over 25,000 people, the investigators broke down which atherogenic particles actually drove myocardial infarction. The surprise: cholesterol carried in VLDL — the triglyceride-rich precursor to LDL — explained about half of the heart-attack risk attributable to all apoB-containing particles, while LDL and its immediate precursor explained the other 29 percent. And the danger of “high triglycerides” turned out to be driven not by the triglycerides themselves but by the cholesterol riding within those triglyceride-rich particles.

The unifying lesson is that every apoB particle — LDL, VLDL, remnants — contributes to risk through the cholesterol it deposits in the artery wall. This is the conceptual foundation for measuring apoB or non-HDL cholesterol rather than LDL alone: those capture the whole atherogenic burden, not just one slice of it.

We rate the evidence strong. It is a large, sophisticated cohort analysis that sharpens our understanding of which lipoproteins cause harm and why broader measures predict risk better.