The apolipoprotein B (ApoB) test counts the atherogenic particles in circulation, because each LDL, VLDL, IDL and Lp(a) particle carries one ApoB molecule. Practitioners add it when LDL cholesterol may understate risk, such as in clients with insulin resistance or high triglycerides. Statins, ezetimibe and PCSK9 inhibitors lower it, so record medicines and recent dose changes before reading a result.
| Test type | Measured in a blood sample |
|---|---|
| Measurements required | Apolipoprotein B (ApoB) only |
| Sample and collection | Blood draw at a collection centre |
| Preparation | This test doesn't need fasting on its own. |
| Turnaround | About 5 to 10 business days |
| Available through | Lipid Studies. Available in: Full Body Health Check. |
| Pricing | Price on sign-up |
| Results | Returned in the Vively practitioner platform, beside your client's other markers |
What are the Apolipoprotein B (ApoB) reference and optimal ranges?
| Typical lab reference | Vively optimal | |
|---|---|---|
| Adults | 0.48 to 1.3 g/L | 0.8 g/L or below |
Labs differ, so read the client's result against the range printed on their report (RCPA guidance). The optimal threshold is a prevention target for discussion and monitoring, not a diagnostic cut-off or a treatment threshold.
Check a client's Apolipoprotein B (ApoB) result
Enter the value from your client's lab report to see where it sits against the typical lab range and the Vively optimal range.
A guide only, not a diagnosis. One result is a starting point: read it with symptoms, history and a repeat test. Labs differ, so check the result against the range on your client's report. Nothing you enter is stored or sent.
How do you arrange Apolipoprotein B (ApoB) testing through Vively?
- Get verified. Practitioners with a recognised qualification or membership (ATMS, NHAA, ANTA, Dietitians Australia, NSA, CMA or Ahpra registration) can request free practitioner access.
- Choose a panel. Log in to the practitioner platform and pick a panel that includes Apolipoprotein B (ApoB), or build your own. Add-on pricing shows when you sign up.
- Client collects. Your client collects at a partner collection centre, with their request on their phone or printed.
- Review results. Results come back to you in the practitioner platform, beside your client's other markers, ready for the follow-up consult.
Which Vively panels include Apolipoprotein B (ApoB)?
Log in to the practitioner platform to view a panel in full, or build and save your own from 100+ tests and panels.
- Log in to view this panelFull Body Health Check87 markers · Health checksPrice on sign-up
Why does the optimal range sit there?
Our target of 0.8 g/L or below sits in the lower part of the lab range, because particle number drives how much cholesterol enters the artery wall.
Genetic and trial data summarised by Sniderman and colleagues (JAMA Cardiology, 2019) show risk rising with ApoB in a dose-dependent way.
The 2019 ESC/EAS dyslipidaemia guidelines set goals of below 1.0 g/L for moderate risk, below 0.8 g/L for high risk and below 0.65 g/L for very high risk. We borrow the high-risk goal as a prevention target for clients without disease.
Treatment decisions rest on absolute cardiovascular risk assessed by the GP.
What should Apolipoprotein B (ApoB) be read with?
- ContextNormal LDL cholesterol, ApoB above 0.8 g/L
Discordance: more, smaller, cholesterol-poor particles, often seen with high triglycerides and insulin resistance.
- HighHigh ApoB with high Lp(a)
Inherited and modifiable particle burden add together, which warrants a GP absolute risk assessment.
- HighHigh ApoB, low ApoA1
An ApoB/ApoA1 ratio above 0.7 means plaque-building particles outnumber HDL particles.
- HighHigh ApoB with high TSH
Hypothyroidism slows LDL clearance and is a treatable secondary cause.
- ContextApoB below 0.48 g/L without lipid-lowering medicine
Seen with malabsorption, hyperthyroidism, liver disease or rare inherited hypobetalipoproteinaemia.
What can affect a Apolipoprotein B (ApoB) result?
- Statins, ezetimibe and PCSK9 inhibitors lower ApoB; record what the client takes and when the dose last changed.
- Hypothyroidism, nephrotic syndrome and cholestasis raise it as secondary causes.
- Pregnancy raises ApoB-containing lipoproteins, so results are not compared with the usual targets.
- Acute illness, surgery or infection can lower lipids for several weeks.
- Corticosteroids, isotretinoin and some antipsychotics can raise lipid levels.
- Large recent weight change, or a shift to a very high saturated fat diet such as some ketogenic patterns.
When should you refer the client to their GP?
- ApoB above 1.3 g/L, or LDL cholesterol at or above 5.0 mmol/L, which can point to familial hypercholesterolaemia.
- Any raised ApoB with premature heart disease in a first-degree relative, or with diabetes, chronic kidney disease or high blood pressure, for an absolute risk assessment.
- Very low ApoB with weight loss, diarrhoea or fatty stools.
- Chest pain or breathlessness on exertion: urgent medical review whatever the result.
How should a client prepare for a Apolipoprotein B (ApoB) test?
Copy or print this to send to your client.
Preparing for your Apolipoprotein B (ApoB) test
- This test doesn't need fasting on its own.
- If your practitioner has requested the Full Body Health Check, fast for 8 to 12 hours before a morning collection (water is fine).
- Take your pathology request to any of 4,000+ collection centres. Bring it printed or on your phone.
- Keep taking prescribed medicines as usual unless your doctor tells you otherwise.
- Results usually take about 5 to 10 business days and come to your practitioner. Book your results appointment for after that.
How do practitioners use Apolipoprotein B (ApoB) with clients?
ApoB moves with dietary pattern. More fibre from wholegrains, legumes, fruit and vegetables, fewer ultra-processed foods and trans fats, regular activity and less alcohol tend to lower it. Retest after about three months of consistent change, and if ApoB stays above target, send the trend to the client's GP for an absolute risk discussion.
Apolipoprotein B (ApoB) FAQs
Can a naturopath, nutritionist or dietitian order ApoB through Vively?
Yes. Add it to any client panel on the Vively practitioner platform. It sits in Lipid Studies and is also in Full Body Health Check. Add-on pricing shows when you sign up. No account yet? Request free access.
If ApoB and LDL cholesterol disagree, which should I go by?
Go by ApoB. When the two are discordant, risk follows particle number more closely than cholesterol content, and discordance is common with high triglycerides, insulin resistance and type 2 diabetes. Report both values to the client's GP, because Australian treatment decisions still sit on absolute risk and LDL cholesterol remains the usual treatment target.
Is ApoB still useful if the client is on a statin?
Yes. On treatment, ApoB shows how many atherogenic particles remain, which LDL cholesterol can understate. Test at least six weeks after any dose change so the result reflects the new steady state. Medication decisions belong to the prescriber, so frame the result as information for the client's next GP review.
What does a low ApoB result mean?
A result below 0.48 g/L without lipid-lowering medicine is uncommon and worth explaining. It is seen with malabsorption, hyperthyroidism, liver disease or rare inherited hypobetalipoproteinaemia. Check albumin and thyroid markers, and ask about weight loss, diarrhoea or fatty stools. If any of these are present, involve the client's GP.
How long before I retest ApoB after a diet change?
Retest after about three months of consistent change. ApoB moves with dietary pattern, fibre intake, activity and alcohol, so earlier repeats rarely show a clear trend. Record large weight changes and any shift to a very high saturated fat diet, as both can move the result independently of the plan.
References
- RCPA Manual. Apolipoprotein B. Source
- Pathology Tests Explained. Apolipoprotein B.
- Mach F, Baigent C, Catapano AL, et al. 2019 ESC/EAS Guidelines for the management of dyslipidaemias. European Heart Journal. 2020.
- Sniderman AD, Thanassoulis G, Glavinovic T, et al. Apolipoprotein B particles and cardiovascular disease: a narrative review. JAMA Cardiology. 2019.