Apolipoprotein B (ApoB): reference ranges

Q: How is ApoB better than LDL cholesterol?

LDL cholesterol measures the cholesterol cargo; ApoB counts the particles. Risk is driven by particle number.

Q: Who benefits most from the test?

People with diabetes, obesity, family history of early infarction, or a normal lipid panel with high overall risk.

Q: Do statins lower ApoB?

Yes — statins reduce the number of atherogenic particles; providers can use ApoB to monitor therapy.

In shortApoB measures the number of atherogenic particles: optimal is below 90 mg/dL (0.9 g/L), high risk is 130 mg/dL (1.3 g/L) and above. It is especially informative in diabetes and obesity, where LDL cholesterol can look normal while particle number is high.

Reference ranges

Group	Reference range
Optimal — typical range (international reference, not a national standard)	< 90 mg/dL (< 0.9 g/L)
Moderate risk — typical range (international reference, not a national standard)	90–129 mg/dL (0.9–1.29 g/L)
High risk — typical range (international reference, not a national standard)	≥ 130 mg/dL (≥ 1.3 g/L)

Gradation from Lab Tests Online (international reference, not a national standard). Targets at high risk are lower and set by the provider.

Check your value

Enter the number from your lab report — see how it compares with the typical range. Mind the units shown in the chosen row.

A rough comparison with a typical range, not a diagnosis. Reference ranges vary between laboratories — check the range on your own report and let a clinician interpret the result.

What this marker is

Every atherogenic particle — LDL, VLDL, lipoprotein(a) — carries exactly one ApoB molecule, so its concentration is effectively a particle count. Risk tracks particle number more closely than the cholesterol inside them.

ApoB is ordered for people with diabetes, obesity, a family history of early heart disease, or a normal lipid panel with high overall risk.

When it is high

Atherosclerotic riskMore atherogenic particles — higher risk of plaque formation.

Familial hypercholesterolemiaInherited elevation of LDL particle number.

Diabetes and metabolic syndromeApoB is often elevated here despite normal LDL cholesterol.

When it is low

Favorable findingLow ApoB means few atherogenic particles.

Rare inherited conditionsAbetalipoproteinemia and hypobetalipoproteinemia give very low values.

What can skew the result

These factors can shift the value without any disease — worth considering before a retest:

Recent food (fasting preferred)HypothyroidismDiabetesStatin therapy

How to prepare

Fasting 8–12 hours; drawn with the lipid panel and ApoA1.

When a retest makes sense

An elevated result is rechecked after 2–3 months of lifestyle change or new therapy.

Who usually reviews this result

A result outside the reference range is usually reviewed by: your GP or primary care doctor; a cardiologist or endocrinologist for risk management. Bring your lab report and any previous results to the appointment.

Names used on lab reports

Your report may use any of these names:
ApoBApolipoprotein B

Units and conversion

Measured in: mg/dL

mg/dL = g/L

g/L = mg/dL × 0.01. Results are rounded to 2 decimal places.

Several markers on your report?

See how MedProtect explains results in the app: the whole report, a check of the recognized values, and a clear breakdown.

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Frequently asked questions

How is ApoB better than LDL cholesterol?