Lipoprotein(a) normal range: Lp(a) levels in nmol/L and mg/dL

Quick answer: in the lipoprotein(a) normal range used by the National Lipid Association, Lp(a) under 75 nmol/L (30 mg/dL) is low risk, 75 to 125 nmol/L (30 to 50 mg/dL) is intermediate, and 125 nmol/L (50 mg/dL) or higher is high risk (NLA, 2024). The 2026 ACC/AHA guideline links 125 nmol/L to about 1.4 times the long-term risk of heart attack or stroke, and 250 nmol/L to at least double. Because the level is mostly inherited and stable, one test is usually enough.

Get your Lp(a) numberLp(a) is on SiPhox Longevity Essentials, Heart & Metabolic and Ultimate 360, collected from the upper arm at home.

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Lipoprotein(a) normal range

Labs report Lp(a) in two units. nmol/L counts particles and is the unit the NLA and most US labs now prefer; mg/dL measures mass. Particle size varies from person to person, so there is no exact conversion. The pairs below are the approximate equivalents the guidelines themselves use.

Cleveland Clinic calls under 30 mg/dL normal but also flags 14 to 30 mg/dL as borderline risk, 31 to 49 as high and over 50 mg/dL as highest risk.

What is lipoprotein(a)?

Lp(a) is an LDL-like particle with an extra protein, apolipoprotein(a), attached to its ApoB. Cleveland Clinic describes it as LDL bound to apo(a). Cleveland Clinic links high levels to a higher risk of heart attack, stroke and blood clots, separately from your LDL cholesterol.

The key fact: your level is set mostly by your genes. The 2026 guideline says Lp(a) is largely genetically determined and stays relatively stable over a lifetime, and the NLA estimates about 1 in 5 people have an elevated level. A standard lipid panel does not include it, so most people have never been tested.

What high Lp(a) means

A high Lp(a) is a lifelong risk factor, not a diagnosis. It matters most when it stacks with other risks: high LDL or ApoB, high blood pressure, diabetes, smoking or a family history of early heart disease. Cleveland Clinic suggests testing in particular if you have:

• A family history of heart disease, or relatives with high Lp(a)
• Familial hypercholesterolemia or high LDL
• A personal history of early coronary artery disease, or repeat events despite treatment

Because it is inherited, the NLA recommends cascade screening: if yours is high, your parents, siblings and children should consider a test too.

Worked example: a high Lp(a) with a family history

Say a 38-year-old woman whose father had a heart attack at 52 gets an Lp(a) of 180 nmol/L. That is 55 nmol/L above the NLA's 125 nmol/L high-risk line and counts as a risk-enhancing factor in the 2026 ACC/AHA guideline. It falls between the two points the guideline ties to extra risk: about 1.4 times the long-term risk at 125 nmol/L and at least double at 250. Her LDL cholesterol of 118 mg/dL is not high on its own, but with this Lp(a) it carries more weight.

What explains it: almost certainly her genes, since the 2026 guideline describes Lp(a) as largely inherited and stable over a lifetime. Diet and exercise will barely move it. What she and her doctor can move is everything around it, starting with LDL.

Questions to take to her doctor:

• Does this Lp(a) change my overall risk estimate and my LDL goal? The NLA advises earlier and more intensive control of other risk factors when Lp(a) is high.
• Should I also check ApoB and hs-CRP?
• Should my brother, sister or children be tested, as cascade screening suggests?
• Do I need to repeat this test? Usually not, per the 2026 guideline, unless the first value was borderline.

What low Lp(a) means

A low Lp(a) is simply good news: it removes one inherited source of risk. Guidelines do not treat a low value as a problem, and there is no lower limit to worry about.

Can you lower Lp(a)?

Not much with lifestyle. The 2026 guideline states that lifestyle changes minimally affect Lp(a). Cleveland Clinic lists statins, PCSK9 inhibitors, aspirin and, for people with familial hypercholesterolemia, apheresis as treatments used, but notes none is FDA-approved specifically to lower Lp(a). Experimental drugs aimed at it are in clinical trials.

What you can change is everything around it. The NLA advises earlier and more intensive control of other risk factors, primarily lowering LDL cholesterol, when Lp(a) is high. Keeping ApoB and hs-CRP in check, not smoking and managing blood pressure all reduce the total risk. Whether you need medication is a decision to make with your doctor.

How to test Lp(a)

It is a routine blood test, but you usually have to ask for it by name. MedlinePlus says some labs ask for a 12-hour fast and no smoking beforehand; check your lab's instructions. Ask which unit the result is in, since 50 in nmol/L and 50 in mg/dL mean very different things.

The 2026 guideline says repeat testing is generally not needed. The exception is if you started with a borderline value or a doctor wants to confirm it.

Which at-home tests include Lp(a)

Lp(a) is on three SiPhox panels: Longevity Essentials, Heart & Metabolic and Ultimate 360. It is not on GLP Optimization, Thyroid Focus or Hormone Focus.

Since you only need Lp(a) once, you do not need a subscription for it. SiPhox also sells each core panel as a one-off kit for $149, and a separate Kidney, Liver and Lp(a) Panel (12 markers) listed at $85 when we checked. SiPhox is a wellness service with no included doctor review, so take a high result to your doctor. See our SiPhox review and ApoB test guide for the full picture.

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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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Test Lp(a) once, at homeLongevity Essentials includes Lp(a), ApoB and hs-CRP in one needle-free draw.

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