Can this result diagnose a condition on its own?

No. Laboratory results are interpreted with symptoms, medical history, sampling conditions, and related tests.

Which reference range or cutoff should I use?

Start with the performing laboratory's report and the purpose of testing; diagnostic cutoffs are separate sourced clinical thresholds.

When should I discuss the result with a healthcare professional?

Results that are clearly outside range, persistent, symptomatic, or unexpected should be reviewed by a healthcare professional.

Information about a laboratory test

High Apolipoprotein B: What Does It Mean?

High ApoB is associated with a greater number of atherogenic lipoprotein particles and can refine cardiovascular-risk assessment.

Test summary

Test name: Apolipoprotein B
Abbreviations: ApoB, ApoB100
Category: Cardiometabolic / Advanced Lipids
Panel: Advanced Lipid / Cardiovascular Risk
Specimen: Serum
Common units: mg/dL, g/L

What does the test measure?

Measures apolipoprotein B carried on atherogenic particles such as LDL, remnants, and Lp(a).

Why is the test ordered?

Can refine risk assessment, particularly in diabetes, high triglycerides, known cardiovascular disease, or discordance with LDL/non-HDL.

Information about a low result

Lower ApoB generally reflects fewer atherogenic particles; very low values require clinical context.

Information about a high result

High ApoB is associated with a greater number of atherogenic lipoprotein particles and can refine cardiovascular-risk assessment.

Reference and clinical context

Use the laboratory report as context, but treatment goals and risk thresholds vary with age, cardiovascular risk, diabetes, kidney disease, and current therapy.

Reference context 1

< 90 mg/dL

Population: Adults
Age range: 18
Specimen: Serum

Desirable adult ApoB level

The source uses <90 mg/dL as the threshold for this context. Individual risk and laboratory context still matter.

Reference ranges may vary by laboratory, method used, age, sex, pregnancy status, and clinical context. The reference range on your own laboratory report takes precedence.

Interpretation notes

ApoB provides particle information that differs from LDL-C and may be especially useful in selected higher-risk groups.

Related specialties

Cardiology
Internal Medicine
Endocrinology
Family Medicine
Pediatric Cardiology

Frequently asked questions

Sources

Apolipoprotein B100 — U.S. National Library of Medicine (MedlinePlus)
Government medical encyclopedia · 2026 · ApoB100 meaning, example reference interval and cardiovascular context · Verified: Aug 12, 2026
Apolipoprotein B, Serum — Mayo Clinic Laboratories
Reference laboratory test catalog · 2026 · Age-specific ApoB categories and interpretation · Verified: Aug 12, 2026
Apolipoprotein A1, Serum — Mayo Clinic Laboratories
Reference laboratory test catalog · 2026 · Sex- and age-specific ApoA1 reference information and ApoB/ApoA1 context · Verified: Aug 12, 2026
Lipoprotein (a) Blood Test — U.S. National Library of Medicine (MedlinePlus)
Government medical reference · 2026 · Lp(a) purpose, genetic stability and cardiovascular-risk context · Verified: Aug 12, 2026
2026 Guideline on the Management of Dyslipidemia – ACC/AHA release — American College of Cardiology / American Heart Association
Professional guideline summary · 2026 · Current dyslipidemia guidance; LDL/non-HDL goals, ApoB and Lp(a) risk assessment · Verified: Aug 12, 2026