what is apolipoprotein b

Apolipoprotein B (ApoB) is a protein that helps carry fat and cholesterol through the body. It is the main protein constituent of lipoproteins such as very low-density lipoprotein (VLDL) and low-density lipoprotein (LDL), which are known as bad cholesterol. ApoB attaches to negative types of cholesterol that cause plaque buildup in blood vessels, which can lead to damage and heart disease. An ApoB test is a blood test that measures the amount of ApoB in the blood and can help determine an individuals risk of developing cardiovascular disease. Researchers have found that measuring ApoB may predict heart and blood vessel disease risk better than a lipid panel test. The normal range for ApoB is less than 100 milligrams per deciliter of blood.