Is the Apolipoprotein B (ApoB) test better than the traditional cholesterol test for assessing heart health?

The Apolipoprotein B (ApoB) test can provide additional information regarding the risk of heart disease compared to the traditional cholesterol test, especially in specific cases. While a traditional cholesterol test measures the amount of cholesterol in the blood, the ApoB test focuses on the number of atherogenic lipoprotein particles, which carry harmful cholesterol.

What is the ApoB test and how does it differ from a traditional cholesterol test?

A traditional cholesterol test, also known as a lipid panel, measures levels of total cholesterol, low-density lipoprotein (LDL) cholesterol, high-density lipoprotein (HDL) cholesterol, and triglycerides [1]. These measurements reflect the quantity of cholesterol present in the blood.

The ApoB test measures Apolipoprotein B, a protein found on the surface of all lipoprotein particles that contribute to atherosclerosis, such as low-density lipoprotein (LDL) and very-low-density lipoprotein (VLDL) [3]. Each of these particles contains one molecule of ApoB; therefore, measuring ApoB provides a direct count of these atherogenic particles [3]. It is believed that the number of these particles is a significant factor in the development of heart disease.

When might an ApoB test be useful?

The ApoB test is not used as a routine screening for the general population, but it may be useful as an additional test in specific situations [4]. Doctors may recommend this test to help determine the risk of cardiovascular disease, particularly in patients with a family history of heart disease or high blood fats (hyperlipidemia), or in cases where LDL cholesterol cannot be accurately calculated [4].

ApoB levels can also be used to monitor the effectiveness of lipid-lowering treatment, as an alternative to non-HDL cholesterol (which is total cholesterol minus HDL cholesterol) [4]. In some rare cases, an ApoB test may be ordered to help diagnose a genetic condition causing an increase or decrease in ApoB production [4].

Practical considerations and choosing the right test

The traditional cholesterol test remains the primary routine screening for assessing heart disease risk for most people [1]. Periodic testing is recommended, with frequency varying based on age, risk factors, and family history. For example, the first screening for people under 19 is recommended between ages 9 and 11, then every 5 years. For adults aged 20 to 65, the test is performed every 5 years, while men aged 45 to 65 and women aged 55 to 65 are advised to have it done every 1 to 2 years [1].

The ApoB test is not a routine exam and is not recommended for widespread use [4]. However, some specialists in lipid clinics may request it [4]. It is important to consult your doctor to determine the most appropriate test based on your personal health history and risk factors. For more information on how to balance good and bad cholesterol to improve your heart health, you can visit Good and Bad Cholesterol: How to Balance Them to Improve Your Heart Health? (Arabic).

Medical references

• Cholesterol Levels: What You Need to Know
• Apolipoprotein B (ApoB, Apo B) - North West London Pathology
• Apolipoproteins (Apo-A1 and Apo B)