This page helps you to understand blood test results for Apo B and gives you the reference range to determine if your lab test results mean that you have high Apo B, low Apo B or normal Apo B levels.
We outline the risk factors associated with both raised and low Apo B levels.
Reference Ranges for Apo B:
|US Conventional Units||mg/dl||<=89||90-119||>=120|
|Standard International Units||mmol/L||<=2.3||2.4-3.1||>=3.2|
What is Apo B
Apo B is the primary protein component of LDL. ApoB is generally regarded as a better indicator of circulating LDL compared to LDL cholesterol .
Function of Apo B
Low-density lipoproteins are the primary carriers of cholesterol in the blood. Apo B allows these particles to attach to specific receptors on the surface of cells, particularly in the liver. The receptors transport low-density lipoproteins into the cell, where they are broken down to release cholesterol. The cholesterol is then used by the cell, stored, or removed from the body .
Risk factors associated with Apo B
Apo B is associated with increased risk of developing heart disease and often outperforms LDL cholesterol as a marker for predicting risk. For example, patients with acceptable LDL cholesterol but elevated Apo B remain at higher risk of developing heart disease, conversely, patients with acceptably low Apo B but moderate LDL cholesterol elevations are at a comparably reduced risk for heart disease .
Notable variations by demographic group
Apo B levels are higher in males than in females and tend to increase with age .