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Heart Health

Is an apoB test a better way to check your cholesterol?

This blood test, which measures a protein in your bloodstream, is more closely linked than LDL cholesterol level to heart disease risk.

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ApoB is a protein that attaches to harmful fat particles in the blood to form lipoproteins, including low-density lipoprotein (LDL). An apolipoprotein B (apoB) test counts the number of LDL particles in the bloodstream as well as other particles that can contribute to clogged arteries and heart attacks.

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About the Reviewer

photo of Cian McCarthy, MB, BCh, BAO, SM

Cian McCarthy, MB, BCh, BAO, SM, Contributor

Dr. Cian McCarthy is an assistant professor of medicine at Harvard Medical School and a cardiovascular medicine attending physician at the Mass General Brigham Heart and Vascular Institute. He attended medical school at University College Cork, … See Full Bio
View all posts by Cian McCarthy, MB, BCh, BAO, SM
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