ApoB test: where to get one, what it costs, and who should test

The short answer: the cheapest and easiest ApoB test

The cheapest stand-alone ApoB test we found is Labcorp OnDemand at $51.75 (on sale from $69 on September 29, 2026), with a blood draw at a Labcorp site and results in 1 to 2 days. The easiest is an at-home panel: SiPhox Longevity Essentials or Heart & Metabolic includes ApoB and Lp(a) for $124 plus $25 shipping, collected on your upper arm without a needle. If you already want a big yearly panel, Function Health and Superpower include ApoB in their memberships.

ApoB and Lp(a) without a lab visitSiPhox Longevity Essentials: ApoB, Lp(a), ApoA1 and 28 more markers from an upper-arm draw at home. $124 plus $25 shipping.

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What an ApoB test measures

Apolipoprotein B is the protein wrapped around every LDL, VLDL and Lp(a) particle, the particles that carry cholesterol into artery walls. Each particle carries exactly one ApoB, so an ApoB test is effectively a particle count. A standard cholesterol test measures how much cholesterol those particles carry, which is not the same thing.

The two numbers usually agree. When they do not, ApoB is the better guide to risk. Harvard Health notes that people with metabolic problems (prediabetes, high triglycerides, fatty liver or belly fat) often have normal LDL cholesterol but high ApoB, because their LDL particles are smaller and more numerous. The 2026 ACC/AHA dyslipidemia guideline brought ApoB into US guidance for the first time, particularly for people with diabetes, high triglycerides or very low LDL. Read more on our ApoB biomarker page.

Where to get an ApoB test, and what it costs

Prices below were read from each seller on September 29, 2026. Lab sales change weekly.

If ApoB is your only question, a $52 lab test is the best value. If you would also buy an Lp(a) test, an inflammation marker and HbA1c, a bundle wins: at SiPhox the full 31-marker test works out to about $4.81 per biomarker. Our at-home blood test cost guide compares every panel per marker.

Your own doctor can also order ApoB. Insurance coverage varies by plan and diagnosis code, so ask what you will pay before the draw.

Who should get an ApoB test

• People with metabolic risk: prediabetes or diabetes, high triglycerides, fatty liver or a large waist. This is the group where ApoB and LDL most often disagree.
• People with a family history of early heart attack or stroke.
• People whose LDL looks fine but who want to confirm their particle count is too.
• People on cholesterol treatment, since the 2026 guideline adds ApoB and non-HDL goals once LDL is at goal. Treatment decisions belong with your doctor.

Test Lp(a) at the same time if you have never had it. The 2026 ACC/AHA guideline and the National Lipid Association both recommend measuring Lp(a) at least once in every adult, because it is mostly genetic and invisible on a standard lipid panel. Our Lp(a) test guide covers where to get it.

Which ApoB test fits you

The right route depends on how many times you will test and what else you want measured. Prices as checked on September 29, 2026.

Testing ApoB at home

SiPhox is the main US option that measures ApoB and Lp(a) together from a sample you collect yourself. You press the EasyDraw device onto your upper arm, it fills a small tube in about five minutes, and you ship it cold overnight from a staffed FedEx location Monday to Thursday. Our EasyDraw guide covers the steps that prevent a failed draw.

ApoB does not strictly need a fast; Cleveland Clinic says you only need to fast if a lipid panel is run at the same time. Labcorp's own ApoB listing asks for a 12 to 14 hour fast, so follow the instructions of whoever runs your test.

Most people start here

Longevity Essentials

$124 + $25 shipping per test

31 biomarkers per test

The default panel: heart, metabolic, hormone and inflammation markers in one draw.

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Heart & Metabolic

$124 + $25 shipping per test

28 biomarkers per test

Lipids plus kidney and liver function: the panel for cardiovascular and metabolic risk.

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Ultimate 360

$249 + $25 shipping per test

62 biomarkers per test

Everything on the four core panels plus iron studies, B12 and folate, GGT and PSA.

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The Longevity Essentials panel also includes ApoA1 and the ApoB:ApoA1 ratio. Heart & Metabolic drops those and adds kidney and liver markers. Ultimate 360 has both.

How to prepare for an ApoB test

1. Pick your time. For a lab visit, book an early slot if you have been asked to fast. For a SiPhox draw, collect Monday to Thursday so you can drop the kit at a staffed FedEx location before 4 p.m. the same day.
2. Follow the fasting rule for your test. ApoB alone does not need it, but a lipid panel run alongside may. Whatever you do, do the same thing next time so results are comparable.
3. Keep your routine normal. Avoid testing the morning after an unusually heavy meal, heavy drinking or a hard endurance session, all of which can move triglycerides and the ratios on your report.
4. For an at-home draw, warm up. SiPhox asks you to drink about 16 oz of water 20 to 60 minutes before, move around, and hold the heat pack on your arm for 4 minutes. Cold arms are the most common reason the device does not fill.
5. Note your medicines. If you take a statin or other cholesterol medicine, record the dose so you can match results to treatment changes.

Reading your ApoB result

Harvard Health describes under 90 mg/dL as desirable for healthy people, 90 to 129 as borderline to moderately elevated, and over 130 as high, with under 70 mg/dL the aim for people who already have heart disease. Cleveland Clinic lists lab reference ranges of 66 to 133 mg/dL for men and 60 to 117 mg/dL for women, and notes that some cardiology guidelines target under 65 or 80 mg/dL. Ranges vary by lab, so compare your number to the range printed on your own report.

Some labs, especially outside the US, report ApoB in g/L. Multiply g/L by 100 to get mg/dL: 0.9 g/L is 90 mg/dL. Our lab unit converter handles this and other conversions.

When ApoB and LDL disagree

Here is an illustration of why the particle count matters. Imagine two people who both have an LDL cholesterol of 110 mg/dL. The first has large, cholesterol-rich LDL particles, so relatively few particles carry that 110. The second has high triglycerides and small, cholesterol-poor particles, so many more particles are needed to carry the same 110. Their LDL results match; their ApoB results do not, and the second person's artery walls are exposed to more particles.

SiPhox reports an LDL-C:ApoB ratio on its Longevity Essentials, GLP Optimization and Ultimate 360 panels to flag this pattern. A low ratio suggests small, dense particles. The triglyceride to HDL ratio on the same report points the same way when it is high. Harvard Health notes discordance is most common in people with metabolic problems, which is why the 2026 guideline highlights ApoB for people with diabetes or high triglycerides.

How often to retest ApoB

• Stable and in range: once a year alongside your other heart markers is plenty.
• Changing diet, weight or exercise: retest after about 3 months. That is long enough for lipids to settle at a new level.
• Starting or changing cholesterol medicine: your doctor will set the recheck, often 4 to 12 weeks after a change.
• Lp(a): usually once is enough, because it is mostly set by your genes.

Quarterly testing with SiPhox costs $596 a year with shipping; twice a year costs $298. Compare that with single lab tests in our blood test cost calculator.

Track ApoB every few monthsRetest monthly, quarterly or twice a year and watch the trend in one dashboard. HSA and FSA eligible.

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Frequently asked questions