Apolipoprotein B Test, (Apo-B)
Below is a plain-language overview of the apolipoprotein b test, (apo-b). The apolipoprotein B (Apo-B) test measures the amount of a protein that carries cholesterol and other fats in your blood. It is ordered to estimate heart disease risk, especially when standard cholesterol tests may not give a full picture.
- Sample type
- blood
- Category
- Lipid & Cholesterol
- Turnaround
- 1-3 business days
- Price
- $118
- Referral
- Not required
The apolipoprotein B (Apo-B) test measures the amount of a protein that carries cholesterol and other fats in your blood. It is ordered to estimate heart disease risk, especially when standard cholesterol tests may not give a full picture.
What it measures
- Apolipoprotein B (Apo-B) — The main protein on LDL and other particles that can clog arteries.
- LDL cholesterol — Often reported alongside Apo-B to show 'bad' cholesterol level.
- Non-HDL cholesterol — All cholesterol not carried by HDL, the 'good' cholesterol.
- Triglycerides — Another type of blood fat that can raise heart risk.
Who it is for
A clinician may order an Apo-B test if you have a personal or family history of early heart disease, diabetes, or high cholesterol that is hard to control. It is also used to monitor treatment for high cholesterol.
Preparation
Fasting is often not required, but your clinician may ask you to fast for 9 to 12 hours if other tests are done at the same time. Always follow the instructions you are given.
Results and what they mean
Results are reported as a number in milligrams per deciliter (mg/dL). Your clinician interprets this number along with your other risk factors; a higher level generally means higher risk. This is general information, not medical advice.
How to order this test
- Choose the test and place a confidential order online.
- Select a certified collection site and pick a time that suits you.
- Have your specimen collected — most draws take only a few minutes.
- Review results in a secure portal, typically within 1–3 days.
Preparation, hours, and pricing vary by site; confirm details directly with the lab before your visit.
Availability by state
Direct-access online ordering for the apolipoprotein b test, (apo-b) is available in most states. It is currently unavailable in 6 states:
Everywhere else you can order confidentially and collect your sample at a certified site. Browse by state →
Frequently asked questions
How is the Apo-B test done?
It is a simple blood draw, usually from a vein in your arm, and takes only a few minutes.
Does Apo-B replace a standard cholesterol test?
No. It is often used together with a standard lipid panel to give a more complete risk picture.
What can affect my Apo-B level?
Diet, exercise, weight, genetics, and some medicines can affect it. Your clinician will consider these factors.
When will I get my results?
Results are typically available in 1 to 3 business days.