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Apolipoprotein B Test, (Apo-B)

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About Our Apolipoprotein B Test, (Apo-B)

The protein Apolipoprotein B (Apo-B) is a protein responsible for carrying fat molecules and cholesterol within the body. The Apolipoprotein B blood test is used to help indicate cardiac risk and vascular disease, especially coronary artery disease (CAD). Apolipoprotein B has been reported to be a powerful indicator of coronary artery disease. In some patients with CAD, Apo-B is elevated even in the presence of normal LDL cholesterol.

Apo-B plays a key role in lipid (fat) metabolism and is typically ordered is there is an elevated risk for heart disease or vascular problems and disorders in an individual's personal and family history.


Fasting Instructions:

No special preparation is needed for an apo B test. However, since this test is often ordered at the same time as other tests that do require fasting, such as LDL-C, HDL-C and triglycerides, fasting for at least 12 hours may be required.


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