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Apolipoprotein B (ApoB)

Also called: ApoB

ApoB counts the number of cholesterol particles that can clog arteries. It can be a better measure of heart risk than LDL in some people.

SampleA small tube of blood from a vein in your arm
Fasting?Usually not needed
ResultsSeveral days
Good to knowOne result rarely tells the whole story. Your provider looks at your results together with your symptoms, exam, and other tests.

What the test is

It's especially useful with high triglycerides, diabetes, or obesity.

Why it's done

  • Fine-tuning heart risk and treatment

Getting ready and what happens

  • Fasting usually isn't needed.

How the test is done

  • A health worker cleans the skin, puts a band around your arm, and draws blood from a vein with a small needle. It takes a few minutes.

What the results mean

ResultTypical range for adults
Higher riskAbout 130 mg/dL or higher

Normal ranges vary from lab to lab and can differ by age, sex, and pregnancy. Your report lists your lab's own range next to each result. A result a little outside the range is often not a problem.

High

Your provider may lower LDL more aggressively.

Questions to ask your provider

  • What do my results mean for me?
  • Do I need to repeat this test or have other tests?

Risks

A blood draw is very safe. You may have slight pain or a small bruise where the needle went in.

Related conditions

Related medicines

Related tests

Sources

Last updated 2026-11-13.