The Apolipoprotein B (Apo B) test measures the levels of Apo B, the main protein component of low-density lipoprotein (LDL), often referred to as "bad cholesterol." This test helps assess cardiovascular risk by evaluating the number of LDL particles, which can contribute to plaque buildup in arteries.

Preparation: No special preparation or fasting is typically required

Procedure: A blood sample is drawn from a vein, usually in the arm.