An Lp(a) test measures a heart risk factor that most men have never heard of and few have ever checked. Lipoprotein(a), or Lp(a), is set mainly by your genes, it stays fairly stable for life, and about one in five people carry a high level. A normal cholesterol result does not rule it out, which is why the 2026 American guideline now says every adult should have it measured at least once.
This guide explains what Lp(a) is, what your number means in both of the units labs use, who should get tested, and what to do if your level comes back high. It also covers where the new Lp(a)-lowering drugs stand, because one major trial reported its first results in September 2026.
Another test that can sharpen your risk picture is a coronary calcium score, which looks for plaque in the heart arteries directly.
In this guide
What Lp(a) is
Lp(a) is a particle that carries cholesterol in your blood. It looks a lot like an LDL particle, the main carrier of so-called bad cholesterol, but it has an extra protein attached called apolipoprotein(a). That extra protein is what makes Lp(a) different, and it is coded by a gene you inherit from your parents.
Because your genes largely set the level, it behaves differently from most numbers on a blood test. According to the 2026 ACC/AHA dyslipidemia guideline, Lp(a) levels stay relatively stable over a lifetime, and lifestyle changes have only a minimal effect on them. Diet, exercise and weight loss, which move LDL cholesterol and blood pressure, barely move Lp(a).
It also does not show up on a standard cholesterol panel; you need a separate Lp(a) test. A routine lipid test reports total cholesterol, LDL, HDL and triglycerides. That is the main reason so few people know their level. Our guide to blood tests for men covers the rest of a sensible panel.
Why it matters
The National Lipid Association describes Lp(a) as an established, independent and causal risk factor for atherosclerotic cardiovascular disease, the artery-clogging process behind most heart attacks and strokes. The 2022 European Atherosclerosis Society consensus statement also links it to aortic valve stenosis, a narrowing of the main valve that lets blood out of the heart.
Three points make it important for men in particular:
- It is common. The NLA estimates that about one in five people have an elevated level.
- It is independent. A high Lp(a) adds risk on top of your LDL cholesterol, blood pressure and other factors. You can have excellent cholesterol numbers and still carry it.
- It often explains a family pattern. If heart attacks run in your family at younger ages, an inherited high Lp(a) is one of the first things to look for.
Lp(a) is one of several numbers that shape your overall picture. Our complete guide to heart health for men shows how it fits alongside blood pressure, cholesterol, blood sugar and the PREVENT risk score.
Who should get an Lp(a) test
The short answer is every adult, once. Two major bodies now agree on this:
- The 2026 ACC/AHA multisociety dyslipidemia guideline, published in March 2026, says Lp(a) should be measured at least once in adulthood. The American College of Cardiology noted that this is the first time its guideline has made a universal screening recommendation for Lp(a).
- The National Lipid Association’s 2024 statement recommends measuring Lp(a) at least once in every adult for risk assessment.
Some groups have extra reason not to wait:
- Men with a parent, brother or sister who had a heart attack or stroke at a young age
- Men who have already had a heart attack, stroke or procedure to open an artery
- Men with very high LDL cholesterol or a diagnosis of familial hypercholesterolemia
- Close relatives of anyone known to have a high Lp(a), since the NLA recommends testing first-degree relatives of people with elevated levels
If you are asking your doctor for one, it often makes sense to request an ApoB blood test at the same time, since the two together give a fuller picture of the particles that build plaque.
How the Lp(a) test works
An Lp(a) test is a standard blood draw, usually done alongside other bloodwork, and you can ask for it by name at your next check-up. Because the level is largely inherited and stable, the 2026 guideline says repeat testing is generally not needed. For most men, one result is enough for life.
Two units, and why they matter
Labs report Lp(a) in one of two units, and this causes a lot of confusion:
- nmol/L counts the number of Lp(a) particles. This is the unit most experts now prefer.
- mg/dL measures the mass of the particles.
Lp(a) particles vary in size from person to person, so there is no exact conversion between the two. The cut-offs below give both units side by side, as the guidelines do. When you get your result, check which unit your lab used before comparing it with anything you read.
What your Lp(a) test result means
The NLA groups results into three bands, and the 2026 ACC/AHA guideline adds an estimate of how much a high level raises long-term risk:
| Lp(a) level | Category | What it means |
|---|---|---|
| Below 75 nmol/L (below 30 mg/dL) | Low risk | Lp(a) is not adding meaningful risk |
| 75 to 124 nmol/L (30 to 49 mg/dL) | Intermediate | A grey zone; weigh it with your other risk factors |
| 125 nmol/L or higher (50 mg/dL or higher) | High risk | About 1.4 times the long-term risk of heart attack or stroke |
| 250 nmol/L or higher (about 100 mg/dL or higher) | Very high | At least twice the long-term risk |
Two things help when reading your result. First, risk rises steadily with the level; the bands are lines drawn on a continuous scale. Second, the guideline treats a high Lp(a) as a risk enhancer. It does not diagnose disease. It tells you and your doctor that your overall risk is higher than your other numbers suggest, which can tip the balance towards earlier or stronger treatment of the things you can change.
If your Lp(a) level is high
A high result can feel alarming, especially when you learn that lifestyle barely moves it. The useful way to think about it: you cannot change the Lp(a), but you can lower the total risk it adds to. Both the NLA and the 2026 guideline advise managing every other risk factor more intensively in people with elevated Lp(a).
Lower your LDL cholesterol harder
This is the main lever. The 2026 guideline sets LDL goals by risk level, and a high Lp(a) supports aiming for the lower end. Our guide on how to lower cholesterol naturally covers the diet and lifestyle side. Many men with high Lp(a) will also need medication:
- Statins remain the foundation of cholesterol treatment. They do not lower Lp(a), but they lower LDL and overall risk, which is the goal.
- PCSK9 antibodies are injectable cholesterol drugs that also lower Lp(a) modestly. In the FOURIER trial, evolocumab reduced Lp(a) by a median of 26.9% at 48 weeks, and men with higher starting levels tended to gain more benefit.
- Niacin lowers Lp(a) somewhat, but large outcome trials of niacin did not reduce heart attacks and strokes, so it is not a recommended treatment for this.
Work on everything else
Blood pressure, smoking, blood sugar, weight and activity all add to the same total risk. Keeping blood pressure in range is one of the most effective steps, and our guide on how to lower blood pressure naturally ranks the changes with the strongest evidence. If you smoke, stopping matters more than ever.
Tell your family
Because Lp(a) is inherited, a high result in you means your children, brothers and sisters have a good chance of carrying it too. The NLA recommends testing first-degree relatives, which can help them act earlier than you could.
The new drugs: where they stand
Several drugs designed to lower Lp(a) directly are in large trials. They can cut Lp(a) levels sharply, and the key open question is whether that prevents heart attacks and strokes.
The first answer came on 4 September 2026, when Novartis announced topline results from the Lp(a)HORIZON trial of pelacarsen. The trial enrolled 8,323 people with elevated Lp(a) and established heart or artery disease. Pelacarsen lowered Lp(a), but it did not reduce major cardiovascular events compared with placebo. The full data have not yet been published.
That result does not settle the question. The NLA has stressed that Lp(a) remains an important independent risk factor and that testing should continue. Other trials are still running, including OCEAN(a)-Outcomes (olpasiran), ACCLAIM-Lp(a) (lepodisiran) and MOVE-Lp(a) (muvalaplin, a tablet). Until they report, the practical plan for a man with high Lp(a) is the one above: know the number, then push hard on the risks you can change.
Frequently asked questions
How often should I get an Lp(a) test?
For most men, once. The 2026 ACC/AHA guideline says Lp(a) should be measured at least once in adulthood and that repeat testing is generally not needed, because the level is largely inherited and stable.
Is Lp(a) the same as LDL cholesterol?
No. Lp(a) is a separate particle that resembles LDL but carries an extra protein. It is not included in a standard cholesterol panel, so it must be ordered as its own test.
Can diet or exercise lower Lp(a)?
Not by much. The guideline notes that lifestyle changes minimally affect Lp(a) levels. Diet and exercise are still important because they lower your LDL, blood pressure and overall risk.
What is a normal Lp(a) test result?
Below 75 nmol/L (30 mg/dL) is considered low risk. Between 75 and 125 nmol/L is intermediate, and 125 nmol/L (50 mg/dL) or higher is high risk. Check which unit your lab used before comparing.
My Lp(a) is high. Do I need a statin?
Not automatically, but a high Lp(a) counts as a risk enhancer that can make treatment more likely to be recommended. Statins do not lower Lp(a) itself, but they lower LDL and overall risk. The decision depends on your full risk profile and is one to make with your doctor.
The bottom line
An Lp(a) test is a one-time blood test that can reveal an inherited heart risk your regular cholesterol results will never show. About one in five people have a high level, and current guidelines say every adult should be tested once. A high result is not a diagnosis, and the first drug trial to report did not cut heart attacks and strokes, but knowing the number changes what you do: lower your LDL more aggressively, control blood pressure, stop smoking, and make sure your relatives get tested too.
This article is for general information and is not medical advice. Talk to your doctor about whether and when to test, how to read your result, and any treatment decisions.
Sources
- American Heart Association: ACC/AHA Issue Updated Guideline for Managing Lipids, Cholesterol (March 2026)
- Koschinsky ML et al. A focused update to the 2019 NLA scientific statement on use of lipoprotein(a) in clinical practice. J Clin Lipidol, 2024
- Kronenberg F et al. Lipoprotein(a) in atherosclerotic cardiovascular disease and aortic stenosis: a European Atherosclerosis Society consensus statement. Eur Heart J, 2022
- National Lipid Association: Top Line Results from the Phase 3 Lp(a)HORIZON Trial (September 2026)
- O’Donoghue ML et al. Lipoprotein(a), PCSK9 Inhibition, and Cardiovascular Risk: Insights From the FOURIER Trial. Circulation, 2019
- HPS2-THRIVE Collaborative Group. Effects of extended-release niacin with laropiprant in high-risk patients. N Engl J Med, 2014