Apolipoprotein B

Apolipoprotein B (ApoB) is the main protein component of LDL cholesterol particles and other atherogenic lipoproteins. Unlike standard cholesterol testing, ApoB directly counts the number of atherogenic particles in your blood, providing a more accurate cardiovascular risk assessment. One ApoB protein sits on each particle regardless of size, making ApoB a superior predictor of heart attack and stroke risk. This test is increasingly recommended for better cardiovascular risk stratification, particularly in people with metabolic syndrome or family history of early heart disease.