Apolipoprotein B (apoB) is a protein that is essential for lipid metabolism and distribution throughout the body. It is a structural protein that is found in lipoproteins, which are complex particles that transport lipids (fats and cholesterol) through the bloodstream.
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A high apoB level, particularly apoB-100 related with LDL cholesterol, is thought to be a risk factor for cardiovascular disease due to its role in the production of atherosclerotic plaques within blood vessels. Measuring apoB levels can provide useful information about a person’s cardiovascular health, perhaps even more so than typical LDL cholesterol measures alone.